King of Caves Complete - LT01

Lava Tube Exploration in Raufarholshellir - Iceland's 4th Largest lava tube cave

Fully licensed travel agency & tour operator

More than just scratching the surface during your Icelandic experience, this cave adventure is surely off the beaten path. In the winter time a lot of ice forms in the forward section of the cave and almost every stone is coated with a thin crust of ice, which makes it hazardous to walk around the cave.

Duration: 5-6 hours

Pick-up: 09:15 - 09:30

Available: All year

Age limit: 12 years

Difficulty: 3/5

Tour Highlights:
  • Iceland's 4th largest lava tube cave
  • Lava formations
  • Icelandic lava field


Pick up & drop off in Reykjavik, guided caving tour, flash light, gloves and helmet.

Not included:

Meals (we recommend bringing packed lunch).

Bring with you:

Warm clothes, gloves, headwear, sturdy shoes. Waterproof outer layers.

Pickup and duration:

Pickup begins at 09:15 and can take up to 20 minutes. We spend around 3-4 hours in the cave, and the total tour duration is around 5-6 hours.



Moderate. Only for people in good physical shape. Good balance is required and good hiking boots are necessary. This tour is not recommended for people with back, knee or other health issues.

19 900 per adult

Children (12-15): 25% off

Operated by a Trusted Partner

Want to do this trip for free? Tag us @extremeiceland on your social media stories and photos during your trip and enter a chance to win a full refund. The winner will be picked once a month!

Do you have a car?:
For those do not select the pickup option in the booking engine: The tunnel is located less than 30 minutes drive (approximately 30 km) from Reykjavík, Iceland and accessible by all vehicles. Driving from Reykjavík east on Route 1 and drive for about 18 km. Turn right onto Route 39 (Þorlákshöfn) and drive for another 12 km. The parking area will be on your left hand side. Click here for a Google Map. The GPS coordinates are: N.63º 56.407 / W. 021º 23.742


Tour Description

lava tunnel iceland

Raufarholshellir, Iceland's 3rd largest lava tube cave

Raufarholshellir lava tube cave is one of the better known lava caves in Iceland and it is easily accessible. The length of the tube is estimated to be 1360 metres. There are four entrances, all in easy reach of each other. The cave is partially collapsed and is difficult to trek, except for the innermost part which is easier because little has broken from the ceiling.

During the winter time a lot of ice forms in the forward section of the cave and almost every stone is coated with a thin crust of ice, which makes it hazardous to walk around the cave.

In the backward section, the cave forks into 3 tunnels, the lava flow from those tunnels probably joined in the Raufarholshellir cave 5000 years ago. Lava falls and other spectacular lava formations can be seen deep in those tunnels.

cave explorers iceland

Exploring the lava tunnel

There are large chambers in Raufarholshellir lava tube, the largest chamber in Iceland, excluding those in Surtshellir and Vidgelmir lava tubes in Hallmundarhraun lava fields in western part of Iceland. The walk around the cave is an exciting journey and there are many things to see.

There’s a road leading to the cave’s entrance and it’s accessible all year round. It takes about an hour to reach the cave from Reykjavik in a car, and the trek through the cave itself takes about four hours. So it is probably best to plan 5-6 hours for the whole tour.

lava tunnel ice

During winter you will find awesome ice formations in the cave

Lava Tubes

Lava tubes are natural conduits through which lava travels beneath the surface of a lava flow, expelled by a volcano during an eruption. They can be actively draining lava from a source, or can be extinct, meaning the lava flow has ceased and the rock has cooled and left a long, cave-like channel.

Lava tubes are formed when an active low-viscosity lava flow develops a continuous and hard crust, which thickens and forms a roof above the still-flowing lava stream. Tubes form in one of two ways: by the crusting over of lava channels, and from flows where the lava is moving under the surface.

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.