Cave Length
1,585 meters
Iceland's largest lava cave, with chambers up to 16.5m wide and 15.8m high.
Vidgelmir: Iceland's Largest Lava Cave
Iceland's largest lava cave, 1,585 meters long and fitted with walkways and lighting, in West Iceland near Husafell.
Location
West Iceland, Husafell
About 1,100 years old. Walkway-equipped.
Quick Answer
Vidgelmir, near Husafell in West Iceland, is Iceland's largest lava cave at 1,585 meters long. Guided tours follow lit walkways through the cave year-round.
Vidgelmir is the largest known lava cave in Iceland and one of the biggest lava tubes on Earth. Formed around 1,100 years ago during an eruption beneath the Hallmundarhraun lava field, the cave stretches 1,585 meters, with chambers reaching over 15 meters high. Installed walkways and lighting let visitors see its colorful lava formations, stalactites, stalagmites, and winter ice sculptures in comfort and safety.
Sources and page update
Updated: 2026-09-10
Vidgelmir is well-managed with walkways and lighting. Warm clothing and sturdy footwear are still recommended as the cave stays cool year-round.
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Official sources to check
Accessibility
Walkways installed
Paved paths and lighting make the cave accessible for families and most fitness levels.
Cave Age
~1,100 years
Created by an eruption under the Hallmundarhraun lava field near Langjokull glacier.
What to Expect
Massive Lava Chambers
Walk through underground chambers reaching over 15 meters in height, with colorful mineral deposits on the walls.
Lava Stalactites & Stalagmites
See delicate lava formations including stalactites, stalagmites, and flow lines that reveal the cave's volcanic origin.
Winter Ice Formations
During colder months, ice stalagmites and frozen columns form near the cave entrance.
Professional Lighting
Lighting has been installed along the visitor route to pick out the geological features and lava colors.
Viking History
Vidgelmir is mentioned in Icelandic sagas and was known to settlers over 1,000 years ago. Archaeological remains have been found inside.
Expert Guided Tours
Guides explain the geology, history, and folklore of the cave during the 1.5-hour tour.
Getting There
Use The Cave’s confirmed meeting location near Húsafell and arrive 10–15 minutes before your tour. If you need transport from Húsafell, book it separately: the operator’s shuttle leaves Húsafell Bistro 30 minutes before the cave departure. That local shuttle is not included automatically and is not a Reykjavík pickup. Confirm the road conditions and your meeting arrangements before driving.
Best Time to Visit
Choose an available departure through The Cave and check the approach-road conditions for your date. The Cave Explorer takes about 1.5 hours and includes a helmet and headlight. Wear warm layers and bring gloves and a hat. Parents with small children should discuss the operator’s early-turnaround arrangements before booking, particularly if seeing every stop matters to the group.
Planning help
Vidgelmir Cave FAQs
Quick answers with safety notes where it matters.
How long is Vidgelmir Cave?
Vidgelmir is Iceland's largest lava cave, stretching 1,585 meters in length with a width of up to 16.5 meters and a height of up to 15.8 meters in places. It is one of the largest lava tubes in the world.
Is Vidgelmir Cave accessible for all fitness levels?
The Cave Explorer follows a lit walkway and is rated 1/5 difficulty by the operator. Families with children under six can join subject to its group-position rules and may need to turn around before the final stop. Contact the operator about your needs; a walkway alone does not establish wheelchair access.
How long does a Vidgelmir Cave tour take?
The standard guided tour lasts about 1.5 hours. Tours depart from the Vidgelmir visitor center near Husafell in West Iceland and include the walk inside the cave with commentary on geology and history.
Can you visit Vidgelmir without a guide?
No, Vidgelmir can only be visited on a guided tour. The cave is privately managed and access is controlled to protect the fragile lava formations and ensure visitor safety. Tours run year-round.
For a countrywide view of Iceland’s volcanic systems, explore our Iceland statistics.