A different view
of volcanic Iceland.

Raufarhólshellir, known as The Lava Tunnel, takes you beneath the volcanic landscape. The cave formed as molten lava flowed beneath a cooling crust during the Leitahraun eruption around 5,200 years ago, leaving a passage through the rock after the lava drained away.

Inside, mineral colours, sculpted walls and openings in the ceiling reveal the structure of that ancient flow. Daylight reaches parts of the entrance through collapsed roof sections, while seasonal ice can add another striking detail in the colder outer chambers.

The standard guided tour uses constructed paths and a footbridge over parts of the rough terrain, with lighting bringing out the cave’s colours. It usually lasts about an hour. This remains a natural cave with uneven surfaces and stairs; a separate longer adventure tour explores farther into the tunnel.