Traverse a lava tube and explore Reykjanes’ geothermal high points on a full-day tour from Reykjavík. Walk through Raufarhólshellir, stand beside Kleifarvatn, and witness steaming Seltún and recent lava flows with expert guides.
More ways to explore the area's outdoor wonders
You step from a warm minibus into a low tunnel mouth; cool cave air greets you and a band of orange and black rock guides your headlamp along the passage. Raufarhólshellir’s mineral walls curve and glint as your guide points out pahoehoe textures and solidified gas bubbles—evidence of flows that once moved like liquid, then stopped in a single violent breath.
Difficulty
moderate
Duration
9 hours
Fitness Level
Basic aerobic fitness for multiple short walks over uneven ground; able to stand and walk for up to an hour between stops.
Wildlife
History
Reykjanes is part of the Mid-Atlantic Ridge expressed on land; human settlements like Grindavík have long adapted to episodic eruptions and shifting shorelines.
Conservation
Geothermal features are delicate—stay on boardwalks, avoid collecting rocks, and pack out waste to protect active systems and fragile lichens.
Reserve your spot on the Iceland Volcanic Landscapes Adventure Lava Tunnels and Craters today and enjoy a trusted, highly rated experience designed to help you make the most of your adventure.
Layer for wind and cold
Temperatures vary dramatically between cave interiors and exposed lava fields—bring breathable insulating layers and a windproof outer shell.
Sturdy, waterproof footwear
Trails are uneven and often wet or muddy; ankle-supporting hiking boots improve traction and comfort.
Stay on boardwalks and marked trails
Geothermal ground is fragile and dangerously hot—follow guides and posted signs to protect yourself and the environment.
Bring snacks and water
The tour is long with short food stops; carry water and high-energy snacks to maintain pace and warmth.
Waterproof hiking boots
Provide traction and ankle support on rocky, wet lava surfaces.
Waterproof wind shell
Shields you from cold coastal winds and sudden showers common on the peninsula.
Headlamp or small flashlight
Useful inside lava tubes where lighting can be dim despite guided illumination.
Insulated water bottle
Keeps liquids from freezing in cold weather and reduces plastic waste.