Iceland's Underground World
Iceland's
Caves
Iceland sits on one of the world's most volcanically active hot spots — the result is an extraordinary network of lava tubes, ice caves and sea caverns carved over thousands of years.
700+
Named lava caves
8,000
Years old (Vatnshellir)
0–5°C
Cave temperature range
30 min
From Reykjavík (Raufarhóll)
Iceland sits on the boundary of the Eurasian and North American tectonic plates — directly above a volcanic hotspot that has been erupting for millions of years. The result is an extraordinary network of lava tubes, formed when molten rock flows underground and hardens on the outside while the liquid interior drains away.
The most visited is Vatnshellir on the Snæfellsnes Peninsula — a perfectly preserved 8,000-year-old tube beneath the glacier. Iceland's largest lava cave, Víðgelmir, stretches 1.5 km and reaches 16 metres in height.
Near Reykjavík, Raufarhólshellir offers professionally lit walkways just 30 minutes from the capital. In the far north, the Lofthellir ice cave near Lake Mývatn contains year-round ice sculptures — unlike glacier ice caves, these form inside a lava tube and never melt.
1 hourStandard Lava Tunnel Tour
The Lava Tunnel (Raufarhóll ehf)
From
8,900 ISK
3 hoursThe Lava Tunnel with transfer from Reykjavik
The Lava Tunnel (Raufarhóll ehf)
From
14,900 ISK
3 hoursVik to Katla Ice Cave Adventure: Explore Iceland's Frozen Wonders
Gravel Travel
From
29,900 ISK
Iceland's Caves
Featured Caves in Iceland
From the ancient lava tubes of Snæfellsnes to the permanent ice sculptures of Lofthellir — Iceland's caves are among the most dramatic underground landscapes on Earth.
Vatnshellir Lava Cave
Descend into the 8,000-year-old Vatnshellir Lava Cave, a subterranean world of ancient formations.
Journey deep into the Earth's crust at Vatnshellir Lava Cave, an 8,000-year-old lava tube in Snæfellsjökull National Park. A striking spiral staircase leads visitors 35 meters down into dimly lit chambers, revealing ancient lava formations and a unique underground landscape. Guided tours offer a safe and enlightening exploration of this accessible geological wonder.
Víðgelmir Lava Cave
Iceland's largest and most spectacular lava cave with colorful rock formations and guided tours.
Víðgelmir is Iceland's largest lava cave, stretching 1,585 metres long with stunning lava formations, stalactites, and colorful mineral deposits. The cave is well-lit and accessible via guided tours from Húsafell.
Krafla Lava Cave (near Vík)
Hidden lava cave near Vík accessible with a guide or for experienced cavers.
Krafla is a lava tube cave near Vík formed by ancient volcanic eruptions. The cave features interesting rock formations, stalactites, and a glimpse into Iceland's volcanic geology. Access requires a guide or caving experience.
Raufarhólshellir Lava Tunnel
Large guided lava tube in Ölfus with managed walkways and lighting.
Raufarhólshellir is a large lava tube in the Leitahraun lava field in Ölfus. A managed guided attraction, The Lava Tunnel, provides access using installed walkways and lighting.
Surtshellir
Iceland's longest lava cave in West Iceland, a dramatic volcanic marvel.
Explore Surtshellir, Iceland's longest and most renowned lava cave, nestled within the vast Hallmundarhraun lava field. Witness the raw power of ancient volcanic activity that sculpted these dramatic underground passages.
Leiðarendi
Explore Leiðarendi, a dramatic lava tube where ancient molten rock carved a mesmerizing subterranean world.
Descend into Leiðarendi, a captivating lava tube cave formed by ancient volcanic flows, revealing a hidden world beneath Iceland's moss-covered surface. Its rugged entrance, framed by dark rocks and vibrant green moss, hints at the geological wonders within.
Know Before You Go
Lava Caves vs Ice Caves
Lava Tubes
Formed when surface lava hardens while molten rock drains beneath. Iceland has over 700 named lava caves — more than any other country of its size. They are stable, permanent and accessible year-round. Major managed tubes: Vatnshellir, Víðgelmir, Raufarhólshellir.
- Year-round guided access
- Stable rock formations — no collapse risk when managed
- Temperature: 3–5°C year-round
Glacier Ice Caves
Formed by meltwater tunnelling through glaciers, glacier ice caves are seasonal — they form each winter and collapse or change shape in spring. The famous blue ice caves of Vatnajökull are only safe November–March. Lofthellir near Mývatn is an exception: it's a lava tube with permanent ice, not a glacier cave.
- Seasonal: November–March only (glacier caves)
- Guide required — glaciers are dangerous without expertise
- Lofthellir (lava tube ice): year-round
All Caves in Iceland
45 caves in our database
Arnesarhellir
west-iceland
Efra-Hvolshellar
south-iceland
Klettshellir
south-iceland
Snjóhellir (Íshellir), Purkhólahraun
snaefellsnes
Stakkar
north-iceland
Þórðarhellir
westfjords
Tintron
south-iceland
Maríuhellar
capital-region
Þakgilshellir
south-iceland
Rauðhólshellir
capital-region
Vegamannahellir
snaefellsnes
Caves of Hella (Hellar við Ægissíðu)
south-iceland
Stórihellir
south-iceland
Páskahellir
east-iceland
Búðahellir
west-iceland
Sönghellir (Cave)
snaefellsnes
Stóragjá
north-iceland
Steinahellir
south-iceland
Borgarhellir
west-iceland
Eyvindarhellir
highlands
Stefánshellir
west-iceland
Gíslahellir
westfjords
Hálsanefshellir
south-iceland
Draugarlág
west-iceland
Snorraríki
south-iceland
Kafhellir
south-iceland
Laugarvatnshellar
south-iceland
Magnahellir
highlands
Fiskhellar
south-iceland
Hellir í botni Ísafjarðar
westfjords
Rútshellir
south-iceland
Hundraðsmannahellir
south-iceland
Mögugilshellir
south-iceland
Nátthagi, Hvammahraun
south-iceland
Stefánshellir, Hallmundarhraun
west-iceland
Lofthellir, Ketildyngja
north-iceland
Valaból og Músarhellir
capital-region
Arnarker
south-iceland
Ice cave at Hrafntinnusker
highlands
Landmannahellir
highlands
Búri
south-iceland
Kvennagjá
north-iceland
Selgjárhellir
capital-region
Loftsalahellir
south-iceland
Þvottahellir
west-iceland
Which Cave Experience Is Right for You?
Choose the format that fits your trip
Guided Tours
- Expert guides for safe underground access
- Browse cave tours →
Photography
- Dramatic lava textures and ice formations
- Browse photo tours →
Self-Drive
- Raufarhólshellir — free parking, easy access
- Iceland trip planner →
Families
- Vatnshellir — lit walkways, all ages welcome
- Browse family-friendly tours →
Guided Cave Tours in Iceland
Expert-guided lava tube and cave exploration tours — from family-friendly lit walkways to adventurous off-trail expeditions
4 hoursThe Complete Katla Ice Cave Tour from Vík
Troll Expeditions
From
37,406 ISK
11 hoursSmall group Tour: Snæfellsnes Peninsula and Lava Cave
Lilja Tours
From
27,500 ISK
4 hoursKatla Ice Cave & Black Beach with Drone
Katlatrack
From
41,500 ISK
3 hoursThe Lava Falls Adventure tour
The Lava Tunnel (Raufarhóll ehf)
From
27,900 ISK
5 hoursBlack & Blue - Lava Tunnel + Silfra Snorkeling
Arctic Adventures
From
23,990 ISK
11 hoursSouth Coast & Katla Ice Cave
BusTravel Iceland
From
35,990 ISK
Visiting Icelandic Caves Safely
Before You Go
- Bring a powerful headlamp and spare batteries — cave lighting fails
- Wear non-slip footwear and warm waterproof layers (caves stay ~3°C)
- Book guided tours for managed caves like Vatnshellir and Víðgelmir
- Never enter an unmarked or unmaintained cave without an expert guide
While Visiting
- Stay on marked walkways — cave floors can be unstable off-trail
- Never touch formations — oils from skin damage lava stalactites permanently
- Watch your head — lava tube ceilings can drop without warning
- Tell someone your plans and expected return time
Photography Tips
- Wide-angle lens captures dramatic ceiling heights and tube geometry
- Long exposure (10–30 sec) reveals colour in low-lit formations
- Tripod is essential — handheld shots blur in cave darkness
- Bring a portable light source to illuminate walls from the side
Frequently Asked Questions
What is the best cave to visit in Iceland?
Vatnshellir on the Snæfellsnes Peninsula is the most famous managed lava tube — 8,000 years old, fully guided, and open year-round. For sheer size, Víðgelmir in West Iceland (Iceland's largest cave at 1.5 km) is unmatched. For convenience, Raufarhólshellir near Reykjavík has professional walkways just 30 minutes from the city.
What is the difference between a lava cave and an ice cave?
Lava caves (lava tubes) are permanent tunnels formed by volcanic activity — solid rock structures that are stable year-round. Glacier ice caves form inside glaciers from meltwater and change shape each season; they are only safe November–March when frozen solid. The exception is Lofthellir near Mývatn — a lava tube that contains permanent ice sculptures year-round.
Are Iceland's caves safe to visit without a guide?
Managed caves like Raufarhólshellir allow self-guided access in the lit sections. Vatnshellir and Víðgelmir require guided tours. Unmanaged caves like Surtshellir and Leiðarendi can be visited with proper equipment (powerful torch, helmet, warm clothes) but hiring a local guide is strongly recommended — cave floors are uneven, ceilings can be very low, and it's easy to get disoriented in the dark.
When is the best time to visit Iceland's caves?
Lava tubes are accessible year-round. Glacier ice caves (blue ice caves in Vatnajökull) are only safe November–March. Summer is peak season for lava cave tours — book in advance, especially for Vatnshellir and Víðgelmir. Winter visits offer fewer crowds but shorter daylight for getting to remote caves.
How long does a cave tour in Iceland take?
Guided tours of Vatnshellir last about 45 minutes. Víðgelmir tours run 45–75 minutes. A guided visit to Raufarhólshellir takes 60–90 minutes including the adventure (off-trail) sections. Leiðarendi cave tours from Reykjavík are typically 3 hours including transport. For Lofthellir near Mývatn, allow 3–4 hours including the snowmobile or 4WD approach.
How do Iceland's lava caves form?
When a volcanic eruption sends a river of lava across the landscape, the outer surface cools and hardens while hot molten rock continues flowing through the interior. When the eruption ends, the liquid lava drains out, leaving an empty tunnel — a lava tube. Iceland's tubes formed 1,000–10,000 years ago and can be hundreds of metres to several kilometres long.
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