Thrihnukagigur Volcano Tour | Go Inside a Magma Chamber

Thrihnukagigur Volcano Tour | Go Inside a Magma Chamber
Þríhnúkagígur is the only magma chamber in the world that you can descend into.
The scale of this magma chamber is awe-inspiring.
The colours of Þríhnúkagígur exist due to the deposits from elements of the earth.
A lift descends into Þríhnúkagígur.
Þríhnúkagígur has been dormant a long time, making this tour perfectly safe.
Þríhnúkagígur magma chamber is one of Iceland's most unique places.
Based on 185 traveller reviews

Descend into the vast and vibrant magma chamber of a dormant volcano. Iceland is the only place in the world where a tour like this exists, so do not miss your opportunity.

This trip will begin when you are picked up from Reykjavík and taken to the Blue Mountains Country Park, Bláfjöll, which sits just on the outskirts of the capital area. From here, it is just a 3.2 kilometre (two mile) hike to Þríhnúkagígur volcano, where you will descend into the volcano itself.

Once you reach the crater, you will find an opening and an elevator crane. After being equipped with a helmet and harness, you will enter the lift's basket and begin your descent. Nowhere else in the world can you enter a magma chamber this way, which is part of what makes this tour so unique and worthwhile. This lift journey toward the centre of the earth covers 198 metres and takes about six minutes.

During your slow descent, the beauty of the magma chamber will become instantly apparent. Intense heat and pressure from Þríhnúkagígur’s most recent eruption, over four thousand years ago, gave the rocks an incredible colouration and texture. Expect to see smooth walls and bizarre formations in yellows, blues, reds, violets and oranges, so vibrant that it’s difficult to believe that they could be natural.

It is not just the beauty of the space that will awe you; it is also the sheer scale of it. To give some perspective on the size of the chamber, enormous monuments such as the Statue of Liberty and Reykjavík’s iconic Hallgrímskirkja church could easily fit inside it. The ground within the chamber is large enough to fit three basketball fields. 

Once your descent down the chamber is complete, your guide will let you out of the elevator, and you can explore for half an hour on the ground of the volcano. You will want your camera on hand, as everything, from the blades of light falling from overhead to the most minute details of the lava rock, is worthy of a photograph. 

Remember as you explore that it is only by a strange, unexpected geological process that this tour is even possible; when a volcano becomes dormant, the magma chamber usually cools and solidifies, yet for some reason in Þríhnúkagígur, it drained away, leaving behind this unimaginably beautiful space.

After your exploration, you will return to the elevator for a gentle ascent, back into the bright, open world. Once you reach the surface, you will have a meal of Icelandic meat soup waiting for you, along with hot beverages and snacks, which you can enjoy before hiking back to the van.

This experience is truly once-in-a-lifetime; descend into a dormant volcano to explore its stunning magma chamber. Do not let this opportunity pass you by. Check availability by choosing a date.

Quick facts

Tour information:
  • Available: Jul. - Oct.
  • Duration: 6 hours
  • Activities: Caving
  • Difficulty: Moderate
  • Minimum age: 12 years.
  • Languages: English
  • Highlights: South Iceland, Reykjavík, Bláfjöll, Þríhnúkagígur
Pickup information:
  • Pickup time : 07:30. 08:30, 09:30, 10:30, 11:30, 12:30, 13:30, 14:30, 15:30,

Pickup starts at 30 minutes before the set departure time (for example 07:30 for the tour at 08:00). Please be ready outside the lobby (or at the bus stop assigned to your hotel). Note that pickup is operated by Gray line, so please keep an eye out for a bus from them.

  • Pick-up from and return to your accommodation in Reykjavik

  • All safety gear (helmets, harness, etc.)

  • Small refreshments (soup, coffee/tea and perhaps some sweets)

  • Experienced guides

What to bring:
  • Sturdy shoes for walking/hiking

  • Water

  • Warm clothing and outerwear suited to rainy or chilly weather (The temperature inside the crater is about 5-6°C / 42-43°F)

  • Camera

Good to know:

The weather changes quickly in Iceland, so don't be caught unawares. It is a good idea to bring a sweater or dress in layers which you can remove if you get too warm. Jeans are not recommended for this activity, as moisture quickly spreads through denim fabric and takes a long time to dry, leaving the wearer wet and cold.

Be aware that this tour begins with a hike that is nearly an hour-long, largely uphill, and over rough terrain, thus the trip is not recommended to those with problems in their ankles, knees, back, or other similar ailments.



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The guide's were great, everyone there was really nice and friendly. The weather was perfect sunny warm. The trail is open and well taken care of, the landscape there is amazing, it was a beautiful place to be, it felt like I could wander there for years. Inside the volcano is incredible as well, the guides toldhow the volcano was first explored it's a really interesting story. The ride down was a cool visual spectacle, and after your back from the volcano you get soup, it may have been the best thing I've ever eaten. Hope to take my parents to see it next time, I highly recommend this tour.
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Amazing trip and amazing guide! Down there is so peaceful and quiet that it makes you want to stay there longer. The colors on the chamber of the volcano are mesmerizing. Completely worth the hike, the descent and the ascent. Oh and the soup was delicious!
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What a unique experience! The views while you walk towards the hut and then to the elevator are breath-taking. Then when you think you cannot find something better, you enter the volcano! Special place with layers of geological history and colours. Great guides along the way who know a lot about the area and make sure the experience is memorable. The soup at the end of the trip was delicious and very welcomed. If you like something different, I recommend this tour.
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I booked this not knowing what to expect. I was late for my free shuttle pickup and called the service. Immediately they sent me a shuttle to pick me up so I don't miss it. The staff were extremely helpful and friendly. You hike around 40 minutes in an easy trail with a couple of interesting stops along the way. Then we reach a camp centre for refreshments and they divide us into two groups coz the lift that takes us 120 meters inside the volcano has a limited capacity. The ride was exhilarating. You get to see 5000 years worth of eruptions in 30 minutes. We spent more than enough time in there taking all the pics we like. After we finished inside a delicious lamb soup was waiting us. Vegetarian option was available too. All in all it takes around 4 hours. WELL SPENT. Highly recommended.
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We were lucky to visit Three Peaks on a sunny day in early June. Hike to the basecamp before going inside into volcano was quite flat and easy. Although it can get very windy on lava fields - so never forget to layer up! Our guide is very knowledgable; she made a few stops on the walk to volcano introducing different geological phenomenon. Going inside volcano is truly a life time experience! Plus there's yummy icelandic soup waiting to warm you up after the visit!
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This was an AWESOME experience! I’m so glad I did it. The views were astonishing, and the tour guide Bryndis was fun, friendly, and helpful. I totally recommend doing this, especially if you have a shorter stay in Reykjavík. You will feel like you’ve voyaged to another world. Overall, this is an extremely responsible, safety-conscious group , and I highly recommend this. Also, as a solo female traveler, I still felt completely integrated into the small group and enjoyed my time hiking in with them. Some of the descriptions of the hiking made this sound more extreme than it is. It is a flat hike on a well-groomed gravel path until the last 10 minutes, which takes you up a moderate slope after having a coffee break/rest period in their hut. I’m not in great shape, and I did it with no problem. Pack mittens and a hat.
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It was an amazing experience. I would highly recommend this to anyone looking for a unique experience. It does require a moderate hike both ways and it does have uneven terrain in the volcano.​ It is all worth it.
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16/10/18 Well worth the money. The driver could have been a bit chatty, the first tour guide we’d picked up could have also been a bit chatty. When we (9 of us) we’re making our way down to the volcano summit, the tour guide came out of his shell. Amazing experience, I took with me a walking stick and it helped massively up some inclines. Make sure you wear thermals, jogging bottoms and waterproofs over them. Some wore jeans and instantly regretted it. I had the opportunity in joining the tour guide in eating some snowy ice on the way back to the mini bus. It was a laugh. Stick to the slippery iced footsteps when trekking up or down there, I thought I’d pick a clear area of snow and my leg disappeared lol. Saying that, it did bring the small group I was with a bit closer. One tour guide was at the front with 4 people, then myself and the other 4 took a slower hike with the other tour guide. Inside the volcano is fantastic. It was out of this world and well worth the money paid. I had lamb soup after the trek, 2 people I sat with asked for seconds! You can also buy t-shirts and beanie hats. Between 2000-5000 kronar. Book this tour if you want to experience something different and unique!
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It was one of our life time experience. We had a bumpy start as we were expected to have the company name labelled tour bus pick us up from our hotel, after 20 min we did not see the shuttle we called and found out we should be picked up by Gray Line. Gray Line mini bus did made the stop but the driver just sat and waited and then left, and the bus did not have a sign at the front showing for the tour, so we missed our ride. But the people at "inside the volcano" was really nice, they put us in a later tour on the same day. We had our tour on early Oct, we walked an hour in snow to the base camp, it was nice and found we had an opportunity talk with different people around the world (a Israel old couple, a US girl works for a rich guy on yacht). We arrive the base camp and found the staff made a snow house, cutest thing on earth. Then we were transport down to the volcano for about 30 min visit. Came back up had a lamb or veggie soup. Played with a cute little Arctic fox who still in black fur and walk back to the civilization under windy snow. We enjoyed it very much.
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