Available all year long, this speleology tour takes you to unique locations in Iceland’s most spectacular lava tube caves and craters. These beautiful, natural phenomena were created when the surface lava solidified but magma continued to flow in tunnels. Get picked up in Reykjavik or meet us on location.
Our Best-Selling Caving Day Tour
Small Group Experience
Expert Caving Guide
Duration: ~1-3 hours
Group maximum: 12 persons
Available: All year
Age limit: 6 years
- The colorful Raufarhólshellir lava tube cave
- A Scenic drive through a lava field
If you select pick up from Reykjavik, departure begins at 08:00 a.m. Please note that it can take up to 30 minutes for us to arrive.
If you don't need a pick up you can meet us at Raufarhólshellir, 30 minutes from Reykjavik. Please be advised to arrive at least 20 minutes prior to the tour, which starts at 9:30 am.
The total tour duration is around 3 hours, and we spend around 1 hour in the cave and if you meet us on location.
This tour is easy, but you should be able to crawl and walk on uneven surfaces.
Pick-up & drop-off in Reykjavik, guided caving tour, flashlight, gloves and helmet with headlamp.
Bring with you:
Warm clothing, waterproof outer layers, headwear, gloves, and good hiking shoes are recommended (can also be rented on booking). We recommend bringing a packed lunch in case you get hungry.
Reviews on TripAdvisor
"Before we climbed through the narrow opening of the cave, our guide reminded us that today we were cavers, not tourists. That set the stage for the entire tour. Unlike other cave tours, there wasn't a man-made path through the cave and the only light came from our flashlights. There were points in the cave where it was so narrow that we actually had to crawl through. But our guide was experienced and reassured us that we were all capable of making it through. We would definitely do the tour again!"
Raufarhólshellir is one of the longest lava tubes in Iceland. Join us for a fantastic hike on the path of an ancient volcanic eruption.
The Leitahraun eruption carved fascinating lava tubes and caves into the landscape around 5200 years ago. Every winter, wondrous icicles appear at the mouth of the cave.
We’ll see interesting forms of lava stalactites and different rock formations, making this an experience of majestic and almost indescribable beauty. The tunnel stretches about 4500 ft (1360 m), with headroom up to 10 m high.
The volcanic tunnel tour is delightful for all ages -- bring the whole family to discover the hidden world beneath! With endless multitudes of colors and rock formations. Join us for a fantastic opportunity to step outside your comfort zone and go on an underground adventure in Iceland!
Though suitable for beginners, this tour requires participants to be comfortable in sometimes spaces, and to go on all fours.
Respect for nature and safety are our main concerns. There are no handrails, lights or any tools installed in or around the caves. We rely completely on the equipment we carry and it is important that people respect our guidelines.
This tour is operated by a trusted partner.
Map - (click to enlarge)
Read customer reviews
Volcanic Veins - Rated 4.8/5 based on 36 customer reviews
UnderWorld Adventure Tour5 by Samantha W April 5, 2019
Great Tour!!4 by Cody Padlo March 19, 2019
Awesome experience!5 by Christina T. March 8, 2019
Lava tube: if you want to conquer your fears...5 by Alejandro Katz March 2, 2019
Cave with Ice4 by Pete Mulholland February 25, 2019
Amazing5 by Nathan February 20, 2019
Excellent Experience5 by Karley & Jeff January 27, 2019
Good lava cave tour4 by Shreerang A Godbole January 22, 2019
Great day underground5 by Rambling Rose January 20, 2019
Underworld tour with Albert5 by Amanda January 19, 2019
Experience5 by Sonia Sousa December 31, 2018
Well Done & Very Happy!5 by Sharmaine December 12, 2018
Leidarendi cave5 by Terry Stratford December 6, 2018
A Great Afternoon5 by Karen Lawson December 2, 2018
Great snorkeling with great guides5 by Pamela November 19, 2018
Recommended5 by Josh November 4, 2018
Great tour5 by Bettina October 28, 2018
Underworld Lava tubes5 by Jane C October 7, 2018
Despite the crazy Iceland weather - tour guides are awesome5 by Hannah October 6, 2018
Awesome experience5 by Debbie Snelgrove September 29, 2018
Just average3 by Mateusz September 20, 2018
Memorable5 by Gary S. Wasserman September 13, 2018
Great tour, passionate guide5 by Jim September 9, 2018
Amazing tour!5 by Lisa September 4, 2018
Fantastic tour " Underworld"5 by Caradec Anne August 27, 2018
Great lava tube tour5 by Tina July 31, 2018
Interesting visit4 by Jesper July 20, 2018
Awesome tour5 by Deborah Erbs July 18, 2018
Fun in the Caves5 by Michelle July 1, 2018
Emily was the BEST5 by Juli Greenberg June 26, 2018
Just 3 on the tour5 by Tom Lynton June 20, 2018
A perfect tour to explore the unexplored5 by Anik Shah June 20, 2018
Awesome Adventure!5 by Stacey Reid June 8, 2018
Loved the underworld tour of volcano caves5 by BP March 31, 2018
UnderWorld tour3 by Gareth Whale February 27, 2018
All guides where the bomb!5 by Clinton Fuller February 22, 2018
Disclaimer: All our tours are undertaken on the responsibility of its participants. Extreme Iceland does not assume any responsibility for accidents that are caused by its customers or can be traced to their own actions.