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Surtshellir
Surtshellir Lava Cave is a fascinating natural wonder located in Iceland. It is one of the longest lava tubes in the country, stretching about 1.6 kilometers (1 mile) long. Formed by volcanic activity around 1,000 years ago, it provides a unique glimpse into Iceland's fiery past. The cave is named after Surtr, a giant from Norse mythology who was said to live in the fire. The inside of Surtshellir is dark and rugged, with rough lava walls and ceilings. Visitors can see interesting rock formations and ice sculptures formed naturally over time. Exploring Surtshellir requires some caution, as the terrain can be uneven and slippery. It's important to have good shoes and a flashlight when visiting. During winter, parts of the cave can be filled with ice, creating even more stunning sights. Historically, Surtshellir was used by outlaws as a hideout during medieval times. Archaeologists have found evidence of human presence, such as bones and tools. This adds an intriguing historical layer to its natural beauty. Surtshellir Lava Cave offers an exciting adventure for those interested in geology or history, making it a special place to explore in Iceland.
Tuesday: Open 24 hours
Wednesday: Open 24 hours
Thursday: Open 24 hours
Friday: Open 24 hours
Saturday: Open 24 hours
Sunday: Open 24 hours
The Area
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Surtshellir
What other travelers are saying about
Surtshellir
Pretty cool lava tube, fun to explore. Easily accessible in a rental 4x4 or if driving slowly in a FWD vehicle. Surtshellir is cold and dark inside, and it's windy outside. Dress appropriately (gloves would be nice), and watch your step - the rocks are loose, and slippery. Visited July 2024
Visited 16th July 2025. We entered through entrance 1 and continued for a couple hundred meters to reach complete darkness, then returned. If you want a nice experience of going through the tunnel, make sure to have very sturdy shoes (not just soft sneakers), proper headtorches (no, iPhone light is not enough), warm and sturdy clothing (it’s cold down there and anything gets ripped easily). Caving helmet would be ideal but a woolly hat is better than nothing (if you bump your head against the rocks. For me good gloves were essential as you need to grab the rocks to climb over them and they are super sharp. It’s a mega cool experience, we were completely alone, the darkness is magnificent and who can say they climbed through Iceland’s longest lava tunnel eh? In other places on Iceland, you pay a lot of money for the guided tour but this is genuine hiking/climbing, and not elevated walkways with full lighting.
My girlfriend and I initially planned to visit Cave Vidgelmir, but due to time and budget constraints, we decided to leave. A helpful worker suggested this place, and fortunately, we had a 4x4 vehicle that allowed us to access this stunning, remote location. The views were absolutely breathtaking, though the lack of safety barriers meant we had to tread carefully. 2023/8/30
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Frequently asked questions
What makes Surtshellir Lava Cave historically significant?
Surtshellir Lava Cave is notable for being one of Iceland's longest lava tubes and has historical significance due to its use by outlaws during the Icelandic Commonwealth period. Artifacts found inside suggest that it served as a shelter and a hideout.
How was Surtshellir Lava Cave formed?
Surtshellir Lava Cave was formed approximately 1,000 years ago during a volcanic eruption from the Hallmundarhraun lava field. The flowing lava created tunnels beneath the surface as the outer layers cooled and solidified, leaving hollow passages.
What can visitors expect to see inside Surtshellir Lava Cave?
Visitors to Surtshellir Lava Cave can expect to see impressive stalactites and stalagmites formed by dripping lava, as well as unique rock formations. The cave also features large chambers and narrow passages, offering an exciting exploration experience.
Is it safe to explore Surtshellir Lava Cave without a guide?
While it is possible to explore Surtshellir without a guide, it is recommended to have one for safety reasons. The cave's terrain can be challenging with uneven surfaces, low ceilings, and darkness requiring proper equipment such as helmets and headlamps.
When is the best time of year to visit Surtshellir Lava Cave?
The best time to visit Surtshellir Lava Cave is during the summer months when weather conditions are more favorable for travel in Iceland. This period offers longer daylight hours and better road access, enhancing the overall experience.
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