Descend into Raufarhólshellir, one of Iceland’s longest lava tubes, and trace the path of molten rock from an eruption 5,200 years ago. This accessible, one-hour tour pairs geology with practical logistics for travelers based in Reykjavík.
More ways to explore the area's outdoor wonders
You step away from the coastal breeze and into a cool, stone corridor where darkness still remembers the heat that carved it. The passage narrows, platforms lift you above rough pahoehoe floor, and the guide's light picks out rope-like lava textures coiled along the ceiling. For roughly an hour you move through a place where molten rock once pushed like a living thing through underground channels.
Difficulty
easy
Duration
1 hour
Fitness Level
Suitable for most fitness levels; able to walk short uneven sections and climb stairs
Wildlife
History
Raufarhólshellir formed during the Leitahraun eruption roughly 5,200 years ago and records lava flow processes common to the Reykjanes volcanic zone.
Conservation
The tunnel’s delicate flow features are vulnerable to damage—stay on platforms, don’t touch formations, and pack out all waste to preserve the cave for future visitors.
Reserve your spot on the The Lava Tunnel Tour - Raufarhólshellir today and enjoy a trusted, highly rated experience designed to help you make the most of your adventure.
Wear sturdy, closed-toe shoes
Platforms reduce scrambles but floors are uneven and can be slick—sturdy hiking shoes give reliable traction.
Bring a waterproof layer
The cave holds a cool, damp microclimate year-round; a light rain jacket keeps you comfortable before and after the visit.
Mind your head and step
Helmets are provided and low ceilings plus stairs require attention—watch your footing and follow guide instructions.
Drive prepared
Tour does not include pickup—allow extra time for winter driving and park responsibly at the site.
Sturdy hiking shoes
Provide grip on uneven, sometimes wet surfaces inside the tunnel
Waterproof jacket
Keeps you dry and warm in Iceland’s frequently changing weather before and after the cave visit
Warm mid-layer
The cave stays cool year-round—an insulating layer helps on the return walk to your vehicle
Small daypack
Carry water, camera, and any extra layers; keep hands free for balance