Inside the Volcano One-day tour

Our partner: Gray Line Iceland

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This unique volcano tour literally takes you inside a dormant volcano, through the top crater and to the bottom of its magma chamber where molten magma flowed during an eruption.


Reached via an hour long hike and entered by way of an open cable lift, a descent of 120 metres, the ground space inside the volcano is equivalent in size to around three basketball courts, and the cavity could easily fit the Statue of Liberty.



Following an eruption magma chambers usually collapse, but in Þríhnúkagígur the lava drained out like water from a pipe leaving the volcano's plumbing system empty. The Þríhnúkagígur crater is therefore one few places in the world where you can enter a magma chamber.

Minimum age: 12 years old

What´s Included

  • Complimentary pick-up and drop-off for hotels and guest houses in Reykjavik
  • Round-trip transportation
  • Professional travel guide
  • All safety gear, Helmets, harness etc.

What to bring

  • Wear proper walking/hiking shoes - about 2.5 km each way
  • Wear warm clothes - trainers and jeans is not sufficient

Additional information

Minimum age: 8 years old

The tour includes hiking across an uneven ground. The distance each way is approximately 3.5 km, and takes around 45 minutes. Hiking boots are required. The weather can be severe, so dress appropriately. 



Inside the Volcano
More details

Inside the Volcano

Ever wondered what a volcano looks like on the inside? This unique volcano tour, takes you literally inside a dormant volcano, through the top crater and to the bottom of its magma chamber, once filled with steaming hot lava. The dormant Þríhnúkagígur volcano (yeah, good luck trying to pronounce it!) is a unique natural phenomenon. By putting up the necessary gear and equipment, we´ve created a tour that opens the door to a new world. And it really isn´t that complicated to experience it, only a moderate 45-50 min. hike to the crater and then the guts to descend 120 meters/400 ft to the bottom of the crater in an open cable lift. Itinerary Details: Fitness level needed: Moderate (the difficulty is 2-3 out of a possible 5). No knowledge of hiking or climbing is required. It's not an uphill walk, but the surface is hilly and uneven. This is not a tour for those in no or limited physical shape. Distance Walked: Approximately 3 km (2 miles) each way. The walk usually takes around 45-50 minutes (depending on the people in the group). A guide will be with you at all times on the walk. Bring with you: Good hiking shoes and warm clothes. The weather in the mountains is unpredictable and can be very different from how it seems at ground level. Wear warm clothes (sneakers and jeans will not do you any good). Minimum age: 12 years old Maximum number of pax per tour: 15