Enter a 5,200-year-old lava tube minutes from Reykjavík and walk under basalt arches, glowing mineral bands and seasonal ice. This guided tour pairs geology-rich storytelling with safe, accessible pathways and round-trip transport.
More ways to explore the area's outdoor wonders
You step from the coach into a thin, cold breath of air and the hill exhales history: basalt ribs, rippled ceilings and floors once molten and flowing. Headlamp beams pick out orange and black banding while the guide’s voice traces the route of the Leitahraun eruption that formed this tunnel some 5,200 years ago.
Difficulty
moderate
Duration
3 hours (≈1 hour in cave)
Fitness Level
Moderate—able to walk on uneven terrain, stoop briefly and maintain balance for short sections.
Wildlife
History
The Leitahraun eruption produced vast lava flows around 5,200 years ago, creating extensive tubes like Raufarhólshellir that record the dynamics of Icelandic volcanism.
Conservation
Pathways, footbridges and controlled lighting minimize visitor impact and protect fragile formations; follow guide instructions and avoid touching formations to prevent oils and damage.
Reserve your spot on the From Reykjavík: The Lava Tunnel tour with Round-trip Transfer today and enjoy a trusted, highly rated experience designed to help you make the most of your adventure.
Dress in layers
Underground temperatures are several degrees cooler and damp—wear an insulated midlayer under a waterproof shell.
Wear sturdy footwear
The cave has uneven basalt and some wet patches; hiking shoes with grip protect ankles and keep you stable.
Bring gloves
Gloves keep hands warm and protect from rough rock when stepping over low sections or using handrails.
Charge your camera battery
Long exposures and cold drain batteries—bring a neck strap and protect gear from drips and condensation.
Waterproof jacket and pants
Keeps you dry and blocks the damp chill inside the tube and on the walk to the entrance.
Sturdy hiking shoes
Provide traction on wet basalt and support on uneven cave floors.
Insulated midlayer
A warm layer that retains heat in the cave’s cool environment.
Gloves and a hat
Protects hands from cold rock and helps with grip; a hat adds warmth when exiting to the wind.