iceland lava cave tours

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Lava Cave Tours in Iceland

Explore the hidden underworld of iceland’s lava caves.

Lava Caving

• About lava caving

How Do Iceland’s Lava Caves Form?

Iceland is located on the mid-Atlantic Ridge, a geological hotspot. Due to its location, the country has 30 active volcanic systems that form Iceland’s lava caves. After a volcanic eruption, a river of hot lava flows on the Earth’s surface. The stream gradually cools down and the outside of the flow forms a crust. The sub-surface stream of molten lava continues to flow, leaving behind a hardened crust in the form of a tube.

Lava tubes are often multi-layered because multiple rivers of magma flow through them, depositing various minerals. This way the tunnels get reshaped. As a result, every lava tunnel in Iceland is different. The flowing lava splashes, and when it cools down and hardens, it creates stalactites of all shapes and forms. 

Lava Caves in Iceland

Raufarhólshellir Lava Cave

One of Iceland’s best-known and most awe-inspiring ice caves is the  Raufarholshellir lava tunnel . Located only half an hour from Reykjavik, this cave features an array of stunning colors, as moss-covered lava and rock formations fill this incredible space.

In winter it changes appearance and shape, with the arrival of icicles that conduct the light, bringing more color and wonder to this already extraordinary space.

Raufarhólshellir Lava Cave   is one of the longest lava tubes in Iceland. It spans 4,462 ft (1,360 m), with the main tunnel running for 2,953 ft (900 m). The ceiling of the tunnel reaches up to 10 m (33 ft)! The lava tube formed after the   Leitahraun Volcanic Eruption   around 5,200 years ago. However, it was only discovered by geologists in 1950. Impressive rock formations used to decorate the tunnel’s ceiling, but unregulated visits to the cave caused damage to the lava formations. The tunnel is now only available on guided tours , so join our lava tunnel tour and explore Raufarhólshellir Lava Cave with an experienced guide.

Thrihnukagigur Volcano Cave

Thrihnukagigur Volcano Cave  has been ranked one of the must-see places in the world by CNN Travel. The dormant volcano is accessible through its top crater. An open elevator lowers visitors 400 ft (120 m) to the bottom of the volcano’s magma chambers. The inside of the volcano is covered in enchanting green, red, and brown colors due to minerals deposited by the last eruption. Standing inside the massive  Thrihnukagigur Volcano  is a truly unique experience, so join us on a  day tour and explore the inside of the volcano !

Lofthellir Cave

Lofthellir, near   Lake Myvatn , is a captivating lava cave and home to the largest known natural ice sculptures found in any lava tube in Iceland. This is the culmination of thousands of years of incremental influx of water into zero-degree centigrade air space. As the light captures the ice sculptures, they resemble frozen, translucent, beautiful ice stalagmites.

This lava cave was discovered in the 80s after an earthquake when part of its roof collapsed, revealing the wonderland below, first noticed by a plane pilot flying above the massive hole in the ground.

Now this magical 3,500-year-old lava cave is available to visit on a guided   day tour from Akureyri or Myvatn .

As you might imagine, a cave filled with ice sculptures can get chilly, so wear something warm!

Vatnshellir Cave

Vatnshellir Lava Cave  lies in the depths of  Snæfellsjökull National Park . Formed during a volcanic eruption 8000 years ago, the cave now is 114 ft (35 m) under the surface of the Earth and stretches about656 ft (200 m). Surrounded by vast lava fields, the entrance to the cave is not always noticeable, yet the cave is definitely worth a visit!

Once you reach its depths, you’ll be stunned by the cave’s raw beauty, lava formations, and many layers of hardened lava. Watch your step to protect yourself and the cave from any accidents!

Leiðarendi Cave

Leidarendi Cave consists of one long tunnel cave that separates out into smaller chambers. This one is famous for its rich colours; iron deposits created its reds, then there are shades of yellow from sulphur, and dramatic shades of green from copper.

No two lava caves are the same, because each one was created in different circumstances. In this case, Leidarendi formed as the result of two separate volcanic eruptions, a thousand years apart.

The name ‘Leidarendi’ means “the end of the road”, which it was for a poor ram who was found in a dark, deep corner here.

You’ll find this ice cave just 30 minutes outside of   Reykjavik .

Viðgelmir Cave

A quintessential Icelandic attraction, Viðgelmir  Cave   was forged by lava to create something unique and wonderful.

Viðgelmir Cave, was created by a massive eruption in 930 CE and spreads over a 78 sq mi (200 sq km) area, making it the largest lava tube cave in Iceland. It’s part of the Hallmundarhraun lava field in the west of Iceland. Visitors can expect to see fascinating rock formations in bright colours. These colours were created by mineral deposits brought by the flow of lava thousands of years ago.

In 1993 during archeological excavations,   Viking remains   and jewelry were found and preserved. Now the cave is only accessible through guided tours.

Today, it’s an accessible space, with two large entry points and stairwells, walkways and artificial light. Natural light breaks through from above in some points.

Iceland’s largest lava cave sits in the   Snaefellsnes Peninsula , in Borgarfjörður in West Iceland, and you can visit Viðgelmir on our   Snaefellsnes Tour .

Grjótagjá Cave

Grjotagja Cave  is one of the few caves in the country with a hot spring inside. Back in the day, the caves were feared by Icelanders and believed to be inhabited by  trolls. In reality, the caves were a hiding place for outlaws. A famous outlaw named Jón Markússon lived in Grjótagjá for a long time and would bathe in its hot spring.

In more recent times, the cave has become a popular hangout for Icelanders. After more than a dozen eruptions in the 1980s, the water in the spring became too hot to bathe and now it’s only suitable for caving. The cave was featured in an episode of  Game of Thrones .

Buri Cave is one of the most breath-taking lava caves in Iceland and it is located under   Leitarhraun Lava Field .

The first 131 ft (40 m) of Buri Cave were discovered in 1992. The cave was created around 5,000 years ago by a raging lava river. The river was so fierce that it burnt a 55 ft (17 m) deep vertical lava pit.

Buri cave’s chambers are decorated with various lava rock formations, stalagmites, and stalactites. During the winter, ice freezes in unique patterns and creates a stunning vista that changes every year.

Gjabakkahellir

Also known as Helguhellir or Stelpuhellir (“Girl cave”), Gjabakkahellir is over 9,000 years old. This one is unusual in that it has an easy-access entrance on both ends, so you can traverse the whole cave from entrance to exit.

Highlights of this cave include the imtimidating, ‘shark-tooth’ stalagmites that hang from its roof and its many lava formations.

While it’s a relatively easy journey through this ice cave, you will have to use your hands and feet to negotiate this uneven terrain.

This cave is located in Þingvellir National Park, so is very accessible from Reykjavik.

The Best Lava Caving Tours in Iceland

Lava tubes are often affected by natural events such as earthquakes. No matter how stable lava tunnels in Iceland might look, one can never be certain of how natural forces have affected the ancient rocks. That’s why Iceland’s lava caves should only be visited with a guide. Our guides are experts, ensuring that everyone has a safe, secure and fun time.

Raufarholshellir Lava Tube

Combo Tours with Lava Caving in Raufarhólshellir

Lava caving is a fun activity on its own, but you can also combine it with another tour and turn it into a full-day adventure.

Visit  Raufarhólshellir Lava Tube  and see the highlights of the iconic  Golden Circle  in one day!  Thingvellir National Park ,  Geysir Geothermal Area , and  Gullfoss Waterfall  are important natural sites that everyone needs to visit in Iceland. If you’re traveling in winter, add a hunt for the  Northern Lights  for the ultimate Icelandic experience!

If you’ve already visited the  Golden Circle , then join a  Raufarhólshellir and Northern Lights Tour  to enjoy the best Iceland has to offer both under the ground and in the sky.

Snorkeling in Silfra Fissure  is another unique experience on offer in Iceland. Snorkel between two tectonic plates and explore the underwater world!  Combine snorkeling with lava caving and visit Raufarhólshellir  on the same day, or even add a Northern Lights tour to your itinerary!

You can visit Iceland’s lava caves and the Blue Lagoon as part of a single itinerary on our   Lava Caving & Blue Lagoon Tour from Reykjavik   and enjoy the healing powers of Icelandic water.

Horse riding, Iceland

You can also try a combined   lava cave and horse-riding tour   and meet charming Icelandic horses! The purebred horses are friendly and intelligent. Children love them!

If you’re looking for an extreme experience, try out a  caving and ATV tour ! Ride quad bikes across vast lava fields and then explore the same fields from a completely different angle: under the ground!

Buri lava cave

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What is lava caving?

Lava caving is an activity that allows you to go under the surface of the Earth and explore caves shaped by flowing hot lava from thousands of years ago.

Can you go to a lava cave in Iceland without a tour?

Lava caves in Iceland can only be visited with an expert guide. Additionally, everyone inside the cave needs to wear a helmet.

Where are the lava tunnels in Iceland?

Lava caves in Iceland are scattered all over the country. The majority are located in the southeastern and western parts of the island, with an occasional cave or two in the north.

Some of the largest lava caves in Iceland are near Reykjavik. For example, the  Raufarhólshellir Lava Tube  is located less than a 30-minute drive from the capital and is accessible by all vehicles.  Thrihnukagigur Volcano Cave  is only a 25-minute drive away from Reykjavik. 

Varnshellir Lava Cave  in Iceland is on the Snaefellsnes Peninsula, and  Lofthellir Cave  is in North Iceland.

How to prepare for a lava cave tour in Iceland?

When going on a lava cave tour, make sure to wear warm clothing, preferably in different layers. Choose a waterproof top layer and a scarf, gloves, and a hat. Please bring hiking boots (or rent them from us when booking your tour). Your guide will take care of all the necessary safety equipment.

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“ Must See In Iceland ”

In iceland ”.

The Lava Tunnel

Explore the magnificent lava tunnel Raufarhólshellir, one of the longest and best-known lava tubes in Iceland. It is located just 30 minutes from Reykjavík and is easily accessed year round.

A journey into Raufarhólshellir is a unique experience and a great opportunity to witness the inner workings of a volcanic eruption as one walks in the path of lava that flowed during the Leitahraun eruption, which occurred east of the Bláfjöll mountains about 5200 years ago. Every winter spectacular ice sculptures are formed inside the entrance of the cave making the experience of visiting the lava tunnel even more breathtaking.

Only 30 min. From Reykjavík

Fall adventure, we thoroughly enjoyed our tour. our guide was both knowledgeable and funny. the cave is remarkable and fascinating. i would recommend this to anyone.

We offer two kinds of tours to The Lava Tunnel. The Standard tour takes you to the part of the tunnel that is easily accessible for most people and the journey last approximately 55 - 60 minutes (also available with transfer). The Lava Falls Aventure tour is for the true explorers that want to take on adventures tour to the bottom of the cave. The tour is approximately 3-4 hours in the tunnel.

Standard Lava Tunnel Tour

Our standard tour allows you to explore the tunnel in an easy and enjoyable manner. A footbridge has been built and impressive lighting in this part of the tunnel highlights the changing colors and clearly shows the powerful volcanic activity that formed the tunnel.

Standard Tour With Transport

This is a standard tour that includes a bus fare from Reykjavik. Our standard tour allows you to explore the tunnel in an easy and enjoyable manner. A footbridge has been built and impressive lighting in this part of the tunnel highlights the powerful volcanic activity that formed the tunnel.

The Lava Falls Adventure Tour

The Lava Falls Adventure Tour takes you off the beaten path and into the depths of The Lava Tunnel to explore the source of the cave, the magnificent Lava Falls. The Adventure tour requires good fitness and balance. It takes on average 3-4 hours, relying on an experienced guide and head torches to navigate this wonder.

Evening Lava Tunnel Tour

The standard tour takes approximately 1 hour and this evening version is ideal way to take advantage of the long summer days or to combine with an evening activity such as Northern light hunt (in winter) or dinner along the south coast.

Combine Great Tours With Our

Reykjanes, volcano & the lava tunnel, the golden circle & the lava tunnel, lava tunnel walk and whale watching, the lava tunnel and black beach atv tour, the lava tunnel and perlan.

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Skútuvogur 4, 104 Reykjavík, Iceland

(+354) 760 1000

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Iceland Cave Tours - Caving in Iceland

The underground treasures of iceland's volcanoes - explore lava tube caves.

Lava Caving Tours

• Most popular tours
• Tours from Reykjavik
• Tours from Myvatn
• About caving

We have the most comprehensive selection of caving tours in Iceland. We offer everything from scheduled day tours to private multi-day tours. We have caving tours from Reykjavik and on-location for those who have a rental car.

Most Popular Lava caving Tours in Iceland

Raufarhólshellir Lava Caving

Inside the Volcano - Thrihnukagigur Magma Chamber

Lofthellir Cave in North Iceland - From Myvatn

Lava caving tours from reykjavik.

Silfra Snorkeling & Lava Cave Tour

Volcanic Veins and Golden Circle

Lava Tube Caving & Whale Watching - Combo Tour

The Black Lava Tour - Horses and Caving

King of Caves Complete

Quads and Caves - ATV Tour - Combo Activity

Vidgelmir Lava Caving Tour

Lava caving from myvatn.

Explore an underground world of ice wonders

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A few notable caves in Iceland

Caving at thingvellir national park.

Thingvellir is a rift valley formed by the continental drift between the North American and Eurasian Plates. The Thingvellir area has a high concentration of volcanic activity and newly formed lava fields are seen all over. There are a number of lava tube caves in these recently formed lava fields.

Cave Vorduhellir

Vorduhellir lava tube is around 1100 metres long and is the longest of all known lava tubes in the Thingvellir National Park.

Hiking through the lava tube is a fun experience but should not be considered an easy feat. In places you may have to get down on hands and knees and in lots of places you may have to duck your head, but most of the time you should be able to stand upright.

Most parts of the lava tube not been changed by any geologic events for nearly 9000 years, although some breakdown have occurred in parts of the lava tube. The ancient lava flow left behind some interesting formations and patterns that show clearly how the magma flowed freely through the tunnel and how it solidified over time, making these unique patterns. It is really easy to get lost in the Vorduhellir lava tube and people are advised to use the services of expert guides such as the guides of Extreme Iceland.

Cave Tvibotni - Two storied lava tube

Tvibotni is an astonishing lava tube in the Thingvellir National Park and it lies deep within this prominent lava field. The lava tube consists of a spacious chamber and there has been almost no breakdown.

The Tvibotni lava tube has a huge amount of beautiful lava formations. A part of the lava tube consists of a false floor, so there’s a second level. Caution should be taken whilst exploring the upper floor. This cave is larger than expected for a lava tube. When you enter the second half of the upper floor the area has a width of 10 metres and is 10 metres high from floor to ceiling.

The entrance is a gaping pitfall and people are advised to use a ladder to get in and out of the lava tube. Many people consider the Tvibotni lava tube to be one of the most beautiful lava tubes in the Thingvellir National Park.

Cave Gjabakkahellir

Gjabakkahellir is one of these lava tubes which was formed during an eruption about 9000 years ago. The tube is open in both directions, so it is easy to walk through it. Gjabakkahellir is 364 metres long. Gjabakkahellir has a lot to offer the explorer. The entrances are very close to the main road, during the winter time it offers magnificent ice sculptures. Those who are looking for beautiful lava formations will find Teat Stalactites, shelves and many other amazing formations in here.

Lava tube caves near the Blue Lagoon and Blafjoll Mountains

There are a number of lava tube caves in the lava fields in the vicinity of the Blue Lagoon on the Reykjanes peninsula.

Geirdal Lava Tube cave is well over 200 metres long. Geirdal is divided into narrow tunnels, which you have to crawl through, and spacious domes. Geirdal is positioned in Arnarsetur-lava field which covers about 22 square kilometre and which was formed in an eruption around the year 1230 A.C. The lava tube cave, Kubbur, is about 100 metres long and partially on two levels.  Kubbur is also on Arnarsetur-lava field.

Tvigigahellir cave it situated in Eldvarpa-lava field. Eldvarpa-lava field is around 19 square kilometres and was formed from an eruption in a great fissure about 2200 years ago. The path to Tvígígahellir cave is fun to tread and the scenery is astonishing. The Tvígígahellir cave has three openings to the ceiling, and actually joins two volcanic craters by a 15 metre long tube. When inside the cave it’s illustrative to see how volcanic craters are formed by eruption and it’s easy to see the journey of the once molten magma around the crater’s walls.

The main ski resort in south Iceland is located in the  Blafjoll mountain range  near the outskirts of Reykjavik and its neighboring towns.

This area is great for every kind of outdoor activity, hiking and exploring caves whether it is summer or winter. And the greatest fact of all, it’s only half to one hour drive away from Reykjavik. Just west of Blafjoll mountains lies Strompahraun lava field and within it an abundance of lava tubes are to be found. The largest of them and best known are Djupihellir, Langihellir, Tanngardshellir and Rotahellir.

• Cave Langihellir  is around 660 metres long with several openings. The main chamber is over 300 metres long. In here we can see a plethora of lava formations that clearly show the flow of the lava and the solidified results of that flow.

• Cave Djúpihellir  is around 260 metres in length and is a labyrinth of a lava tube. It has several entrances and skylights, there are two chimneys. Djupihellir is partially on 4 levels with spacious chambers on all sides.

On the top level are 2 main chambers with a narrow tunnel between them and from both chambers there are openings to the level below.

• Cave Tanngarðshellir   is 160 metres long. It’s an interesting lava tube that is mostly free of breakdown and with amazing and peculiar lava formations of all sizes and colours. An ancient lava passage, unusual patterns on the floor, amazing colour variations and the row of teeth itself.

The English translation of the name Tanngardshellir is “Cave Dental Arch”.

• Cave Rótahellir  is around 380 metres long and is quite deep below the hardened lava. Multitudes of roots hang from the ceiling of the lava tube. The longest of the roots have been measured at almost 2 metres in length. The cave gets its name from those roots.

Lesser known caves at Reykjanes Peninsula

Hvammahraun is the lava field that originated in the volcanic crater of Eldborg in Brennisteinsfjoll. It covers over 36 sq. km and it has passages to the lowlands in the south and in the west of the mountain.

The roadway to the south shows how great volumes of lava thrust themselves into the surging sea in the inlet of Herdisarvik. We’re able to see where it tumbled off 10.000 year old cliffs into the fizzing ocean. Great amounts of lava also streamed down two gorges known as Mosaskard and Natthagaskard. Uphill from here are 3 very interesting lava tube caves.

Located at Natthagaskard gorge at Reykjanes peninsula, as you get higher up, the scenery gets more beautiful and more terrific with each step. At the edge of the gorge there are 3 lava tube caves. Each lava tube has its own characteristics.  Hallur Cave  is the first lava tube and it’s around 200 meters long. Hallur’s main characteristic is that it leans downwards due to the fact it was the passage for the lava flow down the mountainside.

Annar í Adventu  is another lava tube, 200 metres west of Hallur Cave, and its length is around 220 metres. It has two openings. The southern entrance opens up on the sheer mountain face and from there the scenery towards the sea is amazing, this happens to be an uncommon sight from Icelandic lava tubes.  Natthagi Cave  is the largest of those three caves, 400 metres long. Natthagi has 3 entrances or openings and they’re all skylights. Natthagi boasts of many beautiful lava formations and is among the more interesting lava tubes found in Iceland.

Floki Cave , near Hafnarfjordur, is one of Iceland's longest lava tubes. The eruption that created Tvibollahraun lava field was probably the first volcanic activity that occurred after the island was settled in the year 874 A.D.

A great number of caves are in the Tvibollahraun lava field, but the largest of them is the one named Floki. It only takes about a half an hour to drive  from Reykjavik  to a parking lot near the cave.  From the parking lot it takes you around 30 minutes to walk to the cave’s entrance.

The cave is 1096 metres long and it forks in several directions and can be difficult to navigate. Preparations should be made before entering the cave and people need to be well equipped with flashlights and lanterns. The length of the cave at 1096 metres makes it the 10th longest lava tube in Iceland.

There’s a lot of peculiar and amazing lava flow formations inside Floki lava tube. Some of them have unique forms and hues of colour. If you are open-minded enough and have a vivid imagination, you may be able to mark out “crocodiles” and “dinosaurs” in the unique lava flow formations that are all over the cave.

Brennisteinsfjöll Mountain Ridge - Sulphur Mountains

Brennisteinsfjoll is the synonym for extraordinary natural splendor just south of Reykjavik. This area is covered with hardened lava from 3 distinctive volcanoes nearby. Due to the geography of the area not many have researched it or traveled.

The lava flow from Eldborg Crater, in Brennisteinsfjöll Mountains, flowed through a rift. This is now called  Hvammahraun lava field . In that lava field there is a lava tube named Ferlir.  Ferlir Cave  is well over 500 metres long and is a real labyrinth with magnificent lava formations, glassed walls and vivid colours due to sulfide minerals and oxidation.

Northeast of Eldborg Crater lies the lava field of Kistuhraun which was created from a fissure in the volcano Kista around the year 1000 A.C. Near the volcano Kista there are many lava tubes hidden in its hardened lava field.

Kistufellshraun lava field is the northernmost of the three lava fields in this area and it came from the crater Kistufell around 4000 years ago. The crater is about 400 metres in diameter and in ancient times 3 lava streams flowed from it in different directions. One of the passages is particularly magnificent due to the extreme scale of the forces of nature. The passage has several huge lava tubes, but in many places the ceilings have collapsed.

Lava Tube Caves at Snaefellsnes Peninsula

In Hnappadalur valley in the eastern part of the Snaefellsnes peninsula there was an eruption early in historic times which created the crater Gullborg and the lava field Gullborgarhraun which covers around 15 sq. kilometres.

The magma flowed in several very large subterranean passages, which later on were transformed into lava tube caves.

The volcano known as   Gullborg   is a magnificent crater that’s well worth taking a look at. Ramparts of hardened lava and small passages atop the hardened lava show clearly how the molten magma once flowed.

Gullborgarhellir lava tube cave   is the longest of all the lava tubes in this lava field. The lava tube extends from a pitfall not far from the crater itself.

The length of the cave is estimated to be around 670 metres. Through the first 170 metres, we walk on a tongue of hardened lava, which probably flowed into the cave in the latter part of the eruption. The tongue is rather rugged under foot but once you are over this there is a flat cave floor all the way down to the end of the lava tube. The lava tube's ceiling has not collapsed to any extent. It is rather big and has some unusual lava formations.  This is a fun lava tube to explore. At about 260 metres into the lava tube, the cave forks in two directions which then join again further on in the lava tube. Each tunnel is almost as wide as the main tube itself.

The innermost section of the lava tube is off-limits due to fragile lava formations and is cut off by a sturdy chain. In front of the chain you are able to view those fragile lava formations but you must not cross over the chain.

Vegghellir lava tube cave   is the second longest of the lava tubes in the Gullborg lava field. It’s around 320 metres long. It runs parallel to the Gullborg lava tube and they are not far apart.

Inside the lava tube, there are 2 cylindrical chambers, each around 7 metres wide and 10-12 metres high. Each chamber has big shelves that run along the walls and they clearly show how the lava tide flowed during most of its existence. Not far from the bottom of the cave lies a chimney, 13 metres long that runs all the way to the surface. A certain magnitude of molten magma must have flown through that chimney in earlier times. The Vegghellir lava tube’s name is derived from a wall that is around 74 metres into the lava tube. The wall was laid with rubble and breakdown from the floor of the lava tube and it’s around 4.5 metres wide. The wall is also almost as tall as a man and extends almost to the roof of the lava tube.

No other man-made remains can be found in the lava tube and it’s thought that the wall was built by convicted outlaws that took cover in the cave around the year 1222. The outlaws were able to defend  themselves from behind the wall if they were attacked, however,  they were still captured when they wandered away from the lava tube while they were going for a bath in a nearby geothermal pool! The lava tube is mentioned in the Icelandic Sagas (The Sturlunga Saga) but was lost to modern man until the year 1957 when it was rediscovered. The lava tube, the viking wall from 1222 and the chimney in the bottom of the cave are all sights worth visiting.

The geothermal pool that the outlaw vikings were going to, to get a bath when they were captured is in the neighborhood of the lava tube and it nice to take a dip in it after an exhausting cave trip. Hnappadalur valley also boasts from having a mineral well that has the most volume of water in Iceland, the well is named Raudamelsolkelda.

Hallmundarhraun lava field in West Iceland

Hallmundarhraun lava field   was formed in giant eruption close to the Langjokull glacier around the year 930. Therefore it is likely that the first settlers in the Borgarfjordur area, the Vikings watched the molten lava flow when these giant lava caves were formed. The Hallmundarhraun lava field covers over 242 sq. kilometres. It consists of several large tubes, and some of them are Iceland’s longest and deepest lava tubes.

Hraunfossar (e. The Lava Falls), come from underneath the Hallmundarhraun lava field and cascade down the lava rocks. 

Cave Surtshellir

Surtshellir is the largest and best known of all caves in Iceland. Much has been written about Surtshellir and it is told that in earlier centuries a band of outlaws resided in the lava tube.

From there they raided the countryside and stole livestock from neighboring farms. They fortified the cave and made the authorities’ task in finding and apprehending them more difficult. Today, 1000 years later, the remains of their settlement in the lava tube can still easily be seen.

Surtshellir lava tube is almost 2 kilometres long or 1970 metres. It has 5 skylights, all rather large except for one. The main part of the lava tube is almost 9 metres in height, although in the bottom part of the tube the ceiling is much lower. It will take a whole day to explore every corner of the cave, but if you’re willing to just see the main parts of this famous lava tube, the tour will only take around 2-3 hours.

Stefanshellir lava tube lies not far from Surtshellir. The main entrance to the cave is about 300 metres from Surtshellir’s northernmost skylight. Only about 30 metres divide the lava tubes from being joined into a single lava tube, so it’s really easy to consider them a single lava tube.

Cave Stefanshellir

Stefanshellir lava tube is 1520 meters long and if we add that to the length of Surtshellir lava tube they combine to give 3500 meters of great lava tubes.

The lava tube itself has very little breakdown and fairly smooth floor, so it’s easy to walk around the tube. The main entrance of the tube is a pitfall and can not be seen from far away. The lava tube forks in every imaginable direction and it’s really easy for those who don’t know the tube that well to get lost in the myriad of passageways.

The flat, dark, glacial sands seem to go on forever. Yet suddenly, the majestic Mælifell appears to rise up out of ground before us. Standing almost 200 meters (660 feet) above the surrounding plains, the view from the top will live with you forever. The mountain was formed during a series of eruptions under the huge glacier that covered this region during the last Ice Age. The short, steep climb is of course optional and weather dependent. Yet, just to be in this amazing location is truly a special privilege never to be forgotten.

Cave Vidgelmir

Vidgelmir lava tube is the farthest away of the three lava tubes in Hallmundarhraun lava field. It takes about a half an hour to drive from Surtshellir lava tube to Vidgelmir lava tube. Vidgelmir is around 33 kilometres from the main crater and about 5 kilometres from Surtshellir lava tube. Vidgelmir lava tube is 1585 metres long, the highest point inside the tube is 15,8 metres and at its widest it is 16,5 metres in width.

The tubes volume is well over 150,000 cubic metres. It is clear, with those measurements in mind, that Vidgelmir lava tube is the largest of all lava tubes in Iceland. The pitfall which also doubles as an entrance is huge, 75 metres long and 15 metres wide and it is also very deep.

The cave starts with a narrow tunnel which leads into the main chamber and from there all the way into the bottom of the tube. This cave is huge and there is so much to see. It’s easy to see why Vidgelmir lava tube is considered one of Iceland’s most precious gems.

Tvibollahraun Lava Field

In the lava field Tvibollahraun, only 30 minutes drive from Reykjavik, you can discover a large number of beautiful and exciting lava caves. You are able to take a stroll through the lava field, enjoying both the scenery of the capital and also the lichen entombed lava formations of this ancient lava field.

Spenastofuhellir lava tube  is around 200 metres long and it has some fantastic lava flow formations such as stalactites.  Volundarhusid Cave  (e. The Labyrinth) is only 100 metres south of Spenastofuhellir lava tube. Volundarhusid lava tube is also 200 metres long and has 6 entrances and it forks in every imaginable way just like a labyrinth. It is a colourful lava tube with great lava formations that are very pleasing to the eye.

Nyrdri-Lautarhellir lava tube  is nearly 200 metres away from Volundarhúsid. It has 4 entrances and is partially collapsed. Parts of it are high enough for you to stand up without having to duck your head. There is a narrow tunnel in the southern part of the tube that leads to a chimney, which you can climb up. The lava tube is in total around 150 metres long. Sydri-Lautarhellir lava tube is around 170 metres long, in most places it is high enough for you to stand but if you want to see it all, you will sometimes have to crawl around. The lava tube offers some interesting lava formations.

Do you provide equipment for the lava tube caving tour?

Yes, we will provide you with a headlight and a helmet.

What is recommended to wear on a lava caving tour in Iceland?

The Icelandic weather is very unpredictable therefore we highly recommend to dress in layers. Warm layers closest to you preferably wool/thermal underwear, pants sweater and on top waterproof outdoor clothing. It is also suitable to wear good hiking shoes and gloves. Jeans have proven to be a bad choice.

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Hellaferð í Víðgelmi. (English below)

Víðgelmir er oft sagður vera konungur íslenskra hella og ekki að ástæðulausu. Eins og nafnið gefur til kynna er Víðgelmir afar stór eða u.þ.b. 148.000m3. Þessi undraveröld hefur að geyma litríkar hvelfingar, 1100 ára gamlar hraunmyndanir og árstíðarbundinn ís sem setur skemmtilegan svip á umhverfið. Hellaferð í Víðgelmi er einstök upplifun og við allra hæfi en aðgengi hefur verið stórbætt með tilkomu göngupalla.

The Cave Explorer Tour

Take an unforgettable journey into Iceland’s largest lava cave Víðgelmir in comfort. Learn about Víðgelmir’s creations on this 1.5 hour tour and get introduced to the immense forces that sculpted this land. A unique opportunity to discover the deep impact volcanic eruptions have played in shaping the Icelandic culture has fuelled its mythical stories.

Photo Gallery.

Google Maps

@thecavevidgelmir

Cave Explorer – Lava Cave Tour

This lava caving tour will take you to one of the largest and most beautiful caves in Iceland. Explore the breathtaking subterranean world of the Víðgelmir lava cave, walk through this incredible underground natural wonder on an unforgettable tour the whole family can enjoy.

• Lava caving experience
• One of the largest cave in Iceland
• Sparkling icicles in the winter
• Colorful rock formations
• Hallmundarhraun lava field
• Rainbow-colored walls

What's included

• Guided small group caving tour
• Caving equipment (helmet and headlamp)
• English speaking local expert guides

What's not included

• Transportation

Víðgelmir is around 1600 meters long has an area of 150,000 cubic meters (m³) making it one of the largest lava caves in the world. The cave is located beneath the Hallmundarhraun lava field in Iceland’s highlands.

At the base camp, your friendly caving tour guide will provide you with all the equipment that you need for the tour and give you a quick safety briefing. Then you will begin your descent into the incredible Víðgelmir lava cave, an amazing subterranean wonderland replete with sparkling colorful rock formations and sparkling icicles.

The descent begins through a narrow tunnel. This is the only tight space you’ll encounter in Víðgelmir. The cave then opens out into a spectacular hall, with incredible colorful rock formations. In winter you can see countless icicles and beautiful ice formations as well.

The walkway is lit with strategically placed lights so you can admire the incredible rock formations and the rainbow-colored walls that are truly breathtaking. At the end of the cave, your guide will turn off the lights in the cave, so you’ll be able to experience the total darkness and the huge contrast between the light and the darkness.

Your knowledgeable expert guides will tell you everything that you need to know about the lava cave and the volcanic forces that helped to create it. They will also tell you about the legends that are woven into the fabric of the area.

This lava field was formed during the Viking age, over 1100 years ago, when volcanic craters from under Langjökull glacier erupted. Formed by flowing lava moving under a hardened surface, Víðgelmir lava cave is one of Iceland’s hidden treasures that is well worth seeing.

FAQ & Important Information

The following is important information applicable to this tour. If you have any questions please don’t hesitate to contact us by email or phone, we are here to make your tour exceptional!

Operation: This tour is operated by our trusted partner.

Meet on the location: Please be at the tour start location at least 30 minutes before departure. As much as possible be prepared and ready to go. The Cave is located in West Iceland, in Borgarfjordur, not far from Hotel Húsafell. It takes around 2 hours to drive there from Reykjavik. The cave is accessible by all vehicles and clearly marked on nearby roads. Look for  Fljótstunga, The Cave or Víðgelmir .  Click here for location on a map .

Booking: Our day tours are very popular and we have many days when all the available seats are booked out. Please book your tour early to avoid disappointment. You can book this tour online using the booking form or just call our office. We typically respond to phone calls from 8:00 AM to 17:00 PM GMT – if you do not reach us, please  send an email and we will reply to your message as soon as possible.

Prices: All prices are per person. We accept payment by major credit and debit cards with no additional fees. Gratuities are not included.

Tour itinerary changes: At all times your safety is our first priority. You can expect any kind of weather in Iceland. For this reason, the tour itinerary may be subject to change the sights without notice or the tour might be canceled due to weather, or other unforeseen circumstances. If the timing changes, we will need your valid mobile phone number to contact you and inform you of the time change. Please don’t forget to fill out your phone number on the booking form. If the tour is canceled, you can choose to receive a full refund or to reschedule your tour for another day. We make every effort to avoid any such changes wherever possible.

What to bring: Bring comfortable outdoor clothes, warm layers, with waterproof and windproof outer-layers. Jeans are not suitable clothing; a waterproof jacket and shoes and a warm sweater are highly recommended. It’s best to wear waterproof boots. It’s cold in the cave so, please bring gloves and a hat with no brim. Don’t forget to bring your personal daily medications if required.

Medical conditions: Please let us know of any allergies or medical conditions that you may require assistance with.

Payment and cancelation: Full payment is required at time of booking to secure your place. We require 24 hrs notice of cancellation for a refund. Any cancellation made within less than 24 hours prior to departure will be fully charged.

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ACTIVITY ICELAND by icelandia

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LAVA CAVE & GEOTHERMAL ADVENTURE

Iceland's Silver Circle: a journey through nature's wonders

Discover the magic of Borgafjörður, celebrated by Lonely Planet as a top region to visit. From Europe's mightiest hot spring, Deildartunguhver, to the captivating cascade of Hraunfossar and the mystique of Vidgelmir lava cave, embark on an adventure through Iceland's geothermal wonders and rich history.

Journey to a realm where the power of nature is palpable! Delve deep into the heart of Borgafjörður, a gem in Iceland's west that drew the admiration of Lonely Planet, earning it a place among the “Top 10 Regions To Visit in 2016.”

Our tour unveils the renowned Silver Circle route, a sequence of remarkable sights that capture Iceland's unique geothermal spirit and rich history. At the forefront is Deildartunguhver, not just a tongue twister, but also Europe's most potent hot spring, gushing out a staggering 180 liters (47.5 gallons) of scalding water every second. This thermal marvel isn't just for show; it warms the homes of Borgarnes, Akranes, and nearby farms. So, if you've taken a shower within a 65-kilometer (40-mile) radius, you've already felt its embrace!

But beyond the steam and heat lies a spectacle of cascading beauty: Hraunfossar and Barnafoss. Hraunfossar, or the "Lava Falls", isn’t a single waterfall but a series of rivulets streaming over a distance of about 900 meters out of the Hallmundarhraun lava field. The waterfalls emerge directly from the ground above blanketed by green bushes, providing a breathtaking view that changes with every season. Nearby is Barnafoss, the "Children's Falls". Steeped in local folklore, Barnafoss's azure blue waters churn and rush through a narrow, rocky gorge, a testament to nature's raw power.

The adventure intensifies as we venture into Vidgelmir, Iceland's largestr lava cave, revealing the earth's secrets. The cave stretches 1,595 meters, revealing a dazzling array of stalactites, stalagmites, and vibrant rock formations. The walls, shaped by ancient eruptions, are adorned with mineral-tinted hues of red, orange, and yellow. This subterranean marvel also hides relics from the past, from bones to artifacts, reflecting Iceland's rich heritage.

Lastly, gaze upon the icy vastness of Langjokull, the nation's second-largest glacier, nestled close to Husafell.

Join us and uncover the magic, history, and power of the Silver Circle. Your Icelandic saga awaits!

TourID: SRE36

Activity provider: Reykjavik Excursions by Icelandia

BSÍ Bus Terminal - City center

Need to know.

• All guests are required to show up 15 min before the tour departure.
• Warm cloths are highly recommended along with hats and gloves.
• Bring a camera and your best smile.

Requirements

We ask our guest to bring with them warm cloths, cloves and a hat without a brim. Bring a camera and your best smile.

• Flexible Cancellation
• No Booking Fees

Tour itinerary

Bsí bus terminal, deildartunguhver, hraunfoss / barnafoss, what’s included and what to bring on this tour.

It’s important to always be prepared for your next adventure in Iceland. See our list of what’s included, and what you should bring or add to your trip

Professional guide / Geologist. Helmet and Headlamp.

Not included

Food and drinks

Guest have to bring warm clothes, hats and gloves.

Tour highlights

Are you wondering about something?

If you're planning a trip to Iceland, it's important to be prepared with the right information. Here are some frequently asked questions (FAQs) to help you plan your trip

Can I change my dates?

We understand that your travel plans might change. You can easily change the dates for your booked tours with only one phone call: (+354) 580 5400 by stopping by one of our sales offices, or by sending us an email to [email protected]. You will need to quote your confirmation number to change your dates and give us all the necessary information.

Please remember: Your date change must be requested at least a day before the scheduled departure.

How can I make a booking for a group of people?

You can book for a group of people using our online booking system. Each booking must contain at least one adult.

Reykjavik Excursions Kynnisferðir takes pride in tailor-making and organising tours for private groups, from short trips within Reykjavik to full-circle programs. Our fleet of modern coaches consists of 80 vehicles, ranging from 6 to 70 seats and 4x4 coaches suitable for crossing un-bridged glacier rivers, reaching almost any destination in the highlands. For a tailor-made tour for groups, please send us an email to [email protected].

Where are your sales offices?

Icelandia operates a sales office at the BSÍ Bus Terminal in Reykjavík and a sales office at Keflavik Airport.

What is your refund policy?

Reykjavik Excursions reserves the rights to alter routes, itineraries or timetables without prior notice, should the necessity arise. No liability is accepted for losses, theft or expenses due to delay of any agent, hotel, coach, operator, airline, guide, restaurant or any other persons or companies, however caused. Reykjavik Excursions is not responsible for losses in the event of Force Major, such as natural catastrophes, strikes, weather, war or other causes outside of the control of Reykjavik Excursions. All such losses and expenses are the personal liability of the traveller. We advice all clients to have a travel insurance, as they travel at their own responsibility on tours and transfers.

All cancellations should be in writing and notified at least 24 hours* prior to departure. Cancellations received less than 24 hours prior to departure will be charged full price. (*Except for Blue Lagoon bookings where cancellations must be received with at least 48 hours notice.)

*Cancellation for 3rd party tours depends on the cancellation policy from the tour operator

To request a refund please fill out a refund request .

How far in advance can I book a day tour online?

If a tour is displayed online you can book it and hence guarantee your seat on the tour.

Similar tours

The Lava Tunnel

Delve deep underground on this adventurous lava tunnel tour, just 30 minutes from Reykjavík. Raufarhólshellir is an ideal tour for geology buffs and adventure-seekers. You will see the inner workings of a volcanic eruption while walking in the path of lava that flowed thousands of years ago. This is an easy, guided tour with no caving experience required

Wonders of Snæfellsnes National Park

The Snæfellsnes peninsula is often referred to as “Iceland in miniature”, as you get a little bit of everything. The diverse landscape includes natural wonders like vast black sand beaches, magnificent mountains, large volcanic craters, rich birdlife, and the mighty glacier, Snæfellsjökull. It’s a spectacular slice of Iceland.

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ZigZagonEarth

Plan unforgettable road trips!

10 best lava caves in Iceland (Lava Tunnel + tubes…)

Last updated on November 1, 2023 by Claire Robinson - this article contains affiliate links. If you purchase through them, I get a small commission ( more )

Iceland is the land of fire and ice! And what better way to appreciate the fire than entering a lava tunnel or tube… Inside you can appreciate the layers of lava, the colorful minerals, and the power of nature. Below is my guide to the 10 best lava caves in Iceland with tips, map and photos.

Before my tips + photos, here are my favorites for Iceland:

My favorite platform to rent a car in Iceland: DiscoverCars

The unmissable boat tour: Whale Watching

Fun activity: Swimming in Silfra Fissure

My favorite places to stay:

• Reykjavik: see best rated hotels – e.g. Vintage Boutique Hotel
• Lake Myvatn: see best rated hotels – e.g. Hotel Laxa
• Vik area: see best rated hotels – e.g. Hotel Vik i Myrdal

Best Iceland lava caves – Introduction

Iceland offers some amazing lava fields and lava formations all around the country ( see my favorites ) but have you wondered what is under them? In some areas, nature has sculpted some amazing creations: the lava caves, also known as lava tunnels. Visiting one of them is quite an  experience!

5 best lava caves in Iceland

There are many caves around Iceland (and probably more that we don’t know about), but let’s start with my top 5 for you to visit. I have selected the easiest ones to visit that are also offering incredible experiences. You can see details about each one and more information further down in the article.

• Vidgelmir lava cave – my favorite –  Book your visit to be sure to have a spot
• Vatnshellir lava cave – Book your visit
• Raufarholshellir lava cave (a.k.a The Lava Tunnel) – the most popular – Book your visit
• Leidarendi Cave – Book y o ur visit
• Thrihnukagigur magma chamber (a.k.a. Inside the Volcano experience) – Book your visit

Map of Best Iceland Lava caves

To help you get oriented, below is a map with the locations of those 5 top lava tubes:

All my favorite locations are included (with GPS coordinates, map of region and planning tips) in my travel guide eBooks to help you easily plan your Iceland road trip ( 5 days , 7 days , 10 days , 14 days …) – The Top 3 caves are included (selection must be done to make the planning easier for you…):

Plan your dream trip in Iceland thanks to my guide

• 8 maps to easily plan your itinerary
• 100+ pre-selected locations
• GPS coordinates direct to the carparks
• Tips to make the most of your time
• 130+ original photos to help you choose

How to prepare for a lava cave tour?

• Make sure to wear closed shoes. Hiking shoes are preferred
• Bring layers of clothes to adapt to inside / outside temperature conditions
• Do not enter if you suffer from claustrophobia
• Listen to the guide and wear your helmet properly

#1 – Vidgelmir Cave – largest lave cave in Iceland

Why visit – best features.

Vidgelmir is my favorite lava cave in Iceland. It is a long lava tunnel, the largest in Iceland. It is quite impressive because of its size: 1585m long (1733 yards). Plus at its largest section, it is over 16m wide and almost 16m tall (52ft). It is really worth the detour with lots of fascinating shapes in the lava and friendly guides. Plus, in Winter, water enters the cave and creates ice sculptures inside the cave. A wonderful contrast!

Location / How to get there

• On the Silver Circle, not far from the Hraunfossar waterfalls – see my Silver Circle article
• Unpaved road from Husafell – Shuttle available 
• Reykjavik to Husafell = 1h45 drive
• If you don’t plan on driving, it is included is some 2 day trips from Reykjavik such as this one (see details) and in Winter, it can also be visited on a day trip from Reykjavik in combination with the Ice Tunnel – check out details and availability

Planning tips

• Entrance is only by guided tours
• At the office you will be given helmets to wear
• The tour from the office is 1h30
• Level of difficulty – it is quite an easy tour with overall flat walking and one staircase (easy) – family friendly
• Open all year round
• Number of visitors is limited
• Book your visit to be sure to have a spot

Where to stay 

• Borgarnes is where you will find the most options. It is a practical location if you want to do the Silver Circle on one day and the Snaefellsnes peninsula on another – Check out the best rated accommodations in Borgarnes
• I really enjoyed the Icelandair Hotel Hamar. The views from the room were beautiful and the food really nice –  Check out photos and availability
• Otherwise if you want to stay more in nature, check out the accommodation options around Husafell

#2 – Vatnshellir Cave 

This cave is a lot shorter (200m long – 218 yards), but it is impressive because of its height. It is 8000 years old. Plus the advantage is that it is a short visit, that you can  easily access as you drive around the Snaefellsnes Peninsula. It is not the most beautiful, but it you are limited in time this is a fantastic option to enter a lava cave!

• Located on the Snaefellsnes Peninsula , along the West shore
• Paved road access
• Reykjavik to Vatnshellir Cave = 2h30 drive
• Grundarfjordur to Vatnshellir Cave = 50min drive

• The tour from the office is 50min
• Level of difficulty – No technical difficulty, but there is a very tall circular staircase. People with strong vertigo might have difficulties

• Kirkjufell is my absolute favorite location on the peninsula, so I recommend staying in Grundarfjordur right next to it, to go as many times as you want and during the best lights. You can check out the best accommodations in Grundarfjordur .

Need to rent a car in Iceland?

• Compare prices on my favorite platform:   Discovercars.com – one of the best rated comparison sites!
• Prefer a  compact car  for the narrow streets in villages
• Consider their full coverage option – it for peace of mind! 
• Book early to have a large choice of vehicles!

See all my tips

#3 – Raufarholshellir Cave (the Lava Tunnel) 

Raufarholshellir is probably the most famous of all the caves because it is close to Reykjavik and day tours are offered just to the cave. This is really a tube or tunnel (it is called the Lava tunnel) more than a cave. And it has 3 holes in its ceiling, which means you can enjoy natural light pouring in making it easier to see the lava and its colors. Some photographers are really good at capturing this one, which is another reason why it has become one of the most popular. It is 5000 years old.

• South West Iceland
• Reykjavik to Raufarholshellir Cave = 40min drive
• Short 10min detour from Road 1
• If you don’t plan on driving, day trips are available from Reykjavik to go and enjoy it – Book your excursion

• Entrance only by guided tours
• The tour from the office is 1h
• Level of difficulty – No technical difficulty, but the ground is uneven, make sure to wear comfortable walking shoes

• You are very close to Reykjavik – so,  check out the best rated accommodations in Reykjavik
• Or if you want to stay out of the way by the water, check out the accommodations in the nearby Ölfus.

#4 – Leidarendi Cave – lava tubes

Leidarendi is located in the Tvíbollahraun lava field. It is a very colorful cave with some interesting formations (red from iron, yellow from sulfur, and green from copper). It is actually 2 caves created by 2 different eruptions (2000 and 1000 years ago). And in Winter, this cave also has ice sculptures.

Contrary to the 3 first caves, this one is still raw without man-made structures to facilitate the visit.

• South West Iceland, close to the Blue Mountains
• Reykjavik to Leiðarendi lava cave = 30min drive
• Not far from Aurora Base Camp
• If you don’t plan on driving, day trips are available from Reykjavik combining it with other great activities such as Silfra diving – See options

• Free entrance but due to the risk of visiting a lava tube, you should only visit with a guided tour that can give you proper equipment such as a helmet
• The tour from the Aurora Basecamp is 1h
• Level of difficulty – There is no man-made path. Plus, the ceilings are low. This is not very difficult, but it is not easy either. You will have to squat. Make sure to wear your helmet.
• Book your visit with a guide

I don’t drink coffee

But I also like other drinks and sweets! Do you like the free content you find on my blog? All my tips and practical information, without intrusive advertising…

#5 – Thrihnukagigur Cave – Inside the volcano

Thrihnukagigur (Þríhnjúkagígur) is for the adrenaline-looking visitors. This is not a cave. You are actually entering the magma chamber inside a volcano. The volcano has been dormant for the last 4000 years and shows no sign of activity. Maybe one of the most surprising things you could do in Iceland! The activity is called Inside the Volcano: you get to hike through the lava field and to descend 120m (400ft) inside the chamber.

• Reykjavik to Thrihnukagigur = 35min
• However, the cave is only accessible by organized tour from Reykjavik with 2 options:
• A 6h tour with hike, descent and traditional soup – Check out program and book
• Or a descent combined with an helicopter ride to really make the day an unforgettable experience – Check out program and book

• Hiking is required
• Not available in Winter

#6 – Grjotagja lava cave and pool (used in Game of Thrones)

Grjotagja is a small lava cave created by a fissure in the crust. It is filled with geothermally-heated water in a pool that is between a few centimeters and a few meters deep.

It used to be a popular bathing place until the volcanic activity in Krafla over the period 1975-1984 which caused the temperature of the water to rise. Now it is cooling down, but it is still between 40 and 50 degrees Celsius and bathing is forbidden. Learn more on my article

• North Iceland , not far from lake Myvatn
• Gravel road
• From Reykjahlíð (village East of lake Myvatn) take road 1 towards the East (Egilsstaðir). After about 1 km take exit to gravel road 860 where Grjótagjá is clearly indicated. This is accessible to 2WD and there is a large carpark in front.

• It is on private land – the opening and closure is decided by the landowner. It has been closed a lot recently because of the high impact of visitors. You will have to drive by to see if it is open
• There are 2 entrances to the cave. Both require that you climb down a small wall of big rocks. It is not too difficult, but I do not recommended for people with knee problems.
• Be aware that the roof is not stable
• Bathing is forbidden
• Check out the best rated accommodations in the area .

#7 – Lofthellir Cave

Lofthellir is a 370m long lava tube (400 yards). It was formed 35000 years ago and is located in the lava field Laxardalshraun. It is famous in winter for its ice sculptures. This is truly an ice cave (and not a glacier cave).

Location / Planning tips

• North Iceland, near lake Myvatn
• Hiking required from parking near Mount Hvannfell – 30min
• Floor has water and ice
• Crawling is required
• You should not enter without a guide – see guided tour

Where to stay in Iceland?

My favorites:

• Reykjavik , capital city:   see best rated accommodations  – or  my article on where to stay
• Selfoss , between Golden Circle and South Coast: see best rated accommodations
• Vik,  near waterfalls and glaciers:  see best rated accommodations
• Höfn , gateway to the East fjords:  see best rated accommodations
• Egilsstadir , between fjords and North Iceland:  see best rated accommodations
• Reykjahlid , for the wonders of Lake Myvatn:  see best rated accommodations
• Akureyri , capital of the North:  see best rated accommodations
• Grundarfjordur , on the Snaefellsnes Peninsula:  see best rated accommodations

#8 to #11 – Other caves

#8 –  búri cave.

On the Reykjanes peninsula, Buri cave is 1km long and has a 17m (55ft) deep lava pit: an incredible feature. It is around 5000 years old but was discovered only in 2005! However the site needs protection, and the cave has been closed in 2014. Maybe tours will be organized (but note that it requires crawling and difficult hiking).

#9 – Surtshellir lava cave – West Iceland

Located in West Iceland, Surtshellir is in the Hallmundarhraun lava field. Part of it has very low ceiling and is famous for its ice sculptures. It is located in the same area as Vidgelmir (#1) but more inland into the lava field. Access is via a rough path. 

#10 – Mariuhellar Caves

The 3 caves are located in the Heidmork Nature Reserve, very close to Reykjavik (15min drive). They are very easy to access surrounded by grassy lava land. One is close to the road: Urridakotshellir. The others are Vífilsstadahellir and Draugahellir. Access is free. It can be fun to explore but they are not as beautiful as the ones listed before. Make sure to bring flashlight and helmet.

#11 – Gjabakkahellir Cave

This cave located in the Thingvellir National Park , and also known as Helguhellir or Stelpuhellir, formed 9000 years ago. It offers beautiful lava formations and ice sculptures. Access is free. Make sure to have proper hiking boots, warm clothes, helmet and torch. Access is via a very very small hole and visit requires hiking over big boulders.

Geology Intro – how do lava caves / tubes form?

If you are wondering a little about how they formed, here is a quick geological introduction (more in-depth explanations here ):

Lava tubes form from a lava flow. The river of lava cools down from the outside, forming a crust, while the lava still flows under it.

When the supply of lava stops (at the end of an eruption or if the lava is diverted), the lava drains downslope and leaves the tunnels empty beneath the ground. Those tunnels are only discovered when part of the roof collapses, creating an entrance.

Want to see more of the best Iceland has to offer?

• All my favorite things to do in North Iceland – read article
• Tips to plan your Iceland road trip – read article
• Tips to drive around Iceland – read article
• Itinerary suggestions –  read article
• 45 Most beautiful landscapes in Iceland in pictures – read article
• The best stops on the Ring Road – read article
• The best locations off the beaten path around Iceland – read article
• 21 Most beautiful waterfalls in Iceland – read article
• Top 5 places to see around Myvatn – read article
• 5 best Lava Fields in Iceland – read article
• The 5 most beautiful black sand beaches in Iceland – read article
• The Golden Circle – read article
• The Snaefellsnes peninsula – read article

Planning a trip to Iceland?

Check out my travel guide to help you plan:

And keep track of your own trip!

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Víðgelmir Lava Cave Tour

• Availability

Visit Iceland's Largest Lava Cave

Join Lava Cave Tour Víðgelmir and explore Iceland´s largest lava tube cave before or after your Into the Glacier adventure. The cave Víðgelmir is located only 15 minutes away from Húsafell.

The Cave - 15 minutes drive from Húsafell

• Trip Details
• Bring with you
• Drive to Víðgelmir service house 15 minutes from Húsafell.
• Take a 1 hour guided lava cave tour into Víðgelmir.
• Please note that this tour is operated in partnership with a partner company
• Entrance to Víðgelmir lava cave.
• Guided cave tour
• Headlamps and helmets
• Gloves and hats are recommended
• Jacket and warm sweater

Please note that you should allocate enough time between the Into the Glacier adventure and The Cave Explorer. The Into the Glacier tour takes around 4 hours from Húsafell and back to Húsafell and The Víðgelmir Cave Explorer takes around 2 hours from Húsafell and back to Húsafell.

If you book the 10:00 departure for the Into the Glacier classic tour, then we recommend you book the 15:00 departure for The Cave Explorer Víðgelmir.

Or if you book the 15:00 departure for the Into the Glacier classic tour, then we recommend that you book the 12:00 departure for The Cave.

If you have booked the 12:30 departure Into the Glacier, then we recommend either the 09:00 departure for the cave ( given you will not need the shuttle to Klaki base camp) or the 17:00 departure for the The Cave Explorer.

Please note that this tour is operated in partnership with a partner company.

• Driving Instructions
• Safe Travel

Terms & conditions

• Please note:
• The meeting point is located 15 minutes away from Húsafell
• The GPS co-ordinates for the Cave´s service house are: 64°45’11.6″N 20°48’06.7″W
• The Víðgelmir lava cave tour is operated by The Cave.
• Discount for children and/or teenagers does not apply to group bookings.

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