North IcelandLava cave
Lofthellir
Lava tube near Mývatn with persistent ice formations. Privately owned; Geo Travel guides run a limited number of tours, and the route involves crawling through narrow passages. Bring warm layers.
Caves
Caves of Iceland: Lava Tubes, Ice Formations & Underground Tours
Lava tubes, a lava cave with persistent ice, and tunnels left behind by volcanic activity. Access rules differ: some caves are guided-only, others are open to the public.
Important
Check the specific route
Access rules differ by cave, so check whether a guide is required. Bring warm layers and sturdy boots.
You can visit Iceland’s caves on operator-run tours at Lofthellir, Víðgelmir, Vatnshellir, Raufarhólshellir and Leiðarendi, and Visit Iceland names Gjábakkahellir and Leiðarendi as lava caves open to the public. Natural ice caves in Vatnajökull are a separate winter visit that Visit Vatnajökull says needs a glacier guide, while visitor access to Búri and Surtshellir has not been verified.
Key takeaways
- Vatnshellir on the Snæfellsnes peninsula can be entered only on a guided tour, according to the cave page on ust.is published by the former Environment Agency of Iceland. Vatnshellir Cave (ust.is) (source checked 2026-10-30)
- Visit Iceland names Gjábakkahellir and Leiðarendi as lava caves accessible to the public, while Geo Travel says Lofthellir is privately owned and allows only a limited number of tours. Visit Iceland (source checked 2026-10-30) Geo Travel (source checked 2026-10-30)
- The Lava Tunnel says Raufarhólshellir is less than 30 minutes’ drive, approximately 30 km, from Reykjavík. The Lava Tunnel (source checked 2026-10-30)
- Visit Vatnajökull says natural ice caves in Vatnajökull are accessible from November and usually through March, depending on the weather, and should never be entered without a glacier guide and proper safety gear. Visit Vatnajökull (source checked 2026-10-30) Visit Vatnajökull safety (source checked 2026-10-30)
- Víðgelmir’s operator calls it Iceland’s largest lava cave by volume, while the former Environment Agency of Iceland’s page names Kalmanshellir, approximately 4 km long, as the longest known lava cave. The Cave (source checked 2026-10-30) Kalmanshellir (ust.is) (source checked 2026-10-30)
| Fact | Detail | Notes |
|---|---|---|
| Cave guides on this hub | 8: Lofthellir, Víðgelmir, Vatnshellir, Raufarhólshellir, Gjábakkahellir, Leiðarendi, Búri, Surtshellir | Each cave has its own Iceland.org guide. |
| Cave types | Lava tubes; glacier ice caves; Lofthellir, a lava tube with persistent ice | Visit Iceland (lava tubes), Visit Vatnajökull (ice caves), Geo Travel (Lofthellir). |
| Guided tours only | Vatnshellir | Cave page on ust.is, published by the former Environment Agency of Iceland, checked October 30, 2026. |
| Named as accessible to the public | Gjábakkahellir, Leiðarendi | Visit Iceland, checked October 30, 2026. Confirm route and conditions before entering. |
| Access not verified | Búri, Surtshellir | No official or operator access statement was found. |
| Raufarhólshellir from Reykjavík | Approximately 30 km, less than 30 minutes' drive | The Lava Tunnel (operator), checked October 30, 2026. |
| Natural ice-cave season (Vatnajökull) | From November, usually through March, depending on the weather | Visit Vatnajökull, a regional tourism page last modified in 2020. Check the operator. |
| Temperature inside | 0–4°C in lava caves (Visit Iceland); 0 to −2°C in Lofthellir (Geo Travel) | Each figure applies to its source; there is no single figure for all caves. |
| Vatnshellir tour, adult | ISK 5,900 | Summit Adventure Guides, checked October 30, 2026. Children 5–11 free. |
| Raufarhólshellir standard tour, adult (pre-booked) | ISK 8,900 | The Lava Tunnel, checked October 30, 2026. |
| Raufarhólshellir Lava Falls Adventure | ISK 27,900; minimum age 12; 3–4 hours; difficulty 4/5 | The Lava Tunnel, checked October 30, 2026. |
| Víðgelmir Cave Explorer | 1.5 hours; difficulty 1/5; helmet and headlight included | The Cave (operator), checked October 30, 2026. |
| Phone signal | Usually none inside caves | Visit Iceland: do not rely on calling for help. |
Sources and page update
Updated: 2026-11-03
This guide is for trip planning, not emergency guidance. Caves can have uneven surfaces and zero visibility without lights, and there is usually no phone signal inside. Check whether your cave is guided-only and follow the operator's safety instructions.
For sourcing standards and how to report an error, see the editorial policy.
Official sources to check
Which caves can you visit in Iceland?
Iceland.org has guides to eight caves in Iceland: Lofthellir, Víðgelmir, Vatnshellir, Raufarhólshellir, Gjábakkahellir, Leiðarendi, Búri and Surtshellir. Five of them, Lofthellir, Víðgelmir, Vatnshellir, Raufarhólshellir and Leiðarendi, have operator-run tours, and Visit Iceland names Gjábakkahellir and Leiðarendi as lava caves accessible to the public. Visit Iceland (source checked 2026-10-30) Visitor access to Búri and Surtshellir has not been verified, so open each cave’s guide before you plan around it.
West IcelandLava cave
Víðgelmir
Described by its operator, The Cave, as Iceland's largest lava cave by volume. Walkways and lighting are installed for guided tours, and the Cave Explorer tour includes a helmet and headlight.
SnæfellsnesLava tube
Vatnshellir
Lava tube beneath the Snæfellsnes peninsula, entered only on guided tours. Spiral staircases and uneven ground on the guided route; headlamps are not permitted.
South IcelandLava tunnel
Raufarhólshellir
Lava tunnel run by The Lava Tunnel, under half an hour's drive from Reykjavík according to the operator. Walkways and lighting on the standard tour; the Lava Falls Adventure goes deeper.
South IcelandLava cave
Gjábakkahellir
Lava cave near Þingvellir that Visit Iceland names as accessible to the public. No official access page was found; confirm a suitable route and access arrangements before entering.
ReykjanesLava tube
Leiðarendi
Lava tube near Reykjavík on the Reykjanes peninsula. Requires crouching and crawling in places. Adventure Vikings runs guided tours; it is easy to get disoriented inside.
ReykjanesLava cave
Búri Cave
Large main passage documented in a cave exploration report. Current visitor access has not been verified.
West IcelandLava cave
Surtshellir
Archaeological deposits interpreted in a published study as evidence of ritual activity. That interpretation is distinct from outlaw folklore. Current visitor access has not been verified.
What is the difference between lava caves and ice caves in Iceland?
Lava caves and glacier ice caves in Iceland form in different ways and are visited on different terms. Visit Iceland says lava tube caves are formed by rivers of basaltic lava flowing from a volcanic crater. Visit Iceland (source checked 2026-10-30) Visit Vatnajökull says most ice caves in Vatnajökull form as canals for water running through or at the bottom of the glacier. Visit Vatnajökull (source checked 2026-10-30)
Natural ice caves in Vatnajökull are a winter visit. Visit Vatnajökull says they are accessible only from November and usually throughout March, depending on the weather, and that they should never be entered without a glacier guide and proper safety gear. Visit Vatnajökull (source checked 2026-10-30) Visit Vatnajökull safety (source checked 2026-10-30) Visit Vatnajökull’s page was last modified in 2020, so treat the season as a general pattern and confirm dates with the tour operator.
Lofthellir sits between the two. Geo Travel describes it as a permafrost ice cave inside a lava tunnel, with ice formations some hundreds of years old. Geo Travel (source checked 2026-10-30) Lofthellir is still a lava cave, not a glacier ice cave, so the Vatnajökull ice-cave season does not apply to it; check Geo Travel’s tour dates instead. Operators, prices and terms for glacier ice-cave tours are compared in Iceland ice cave tours.
Do you need a guide to visit caves in Iceland?
Whether you need a guide depends on which cave in Iceland you choose. The Vatnshellir page on ust.is, published by the former Environment Agency of Iceland, says: “Visitors can not go into the cave unless in guided tours.” Vatnshellir Cave (ust.is) (source checked 2026-10-30) Geo Travel says Lofthellir is privately owned and allows only a limited number of tours, Geo Travel (source checked 2026-10-30) while Visit Iceland names Gjábakkahellir and Leiðarendi as accessible to the public. Visit Iceland (source checked 2026-10-30)
“the most stunning and decorated ones are usually closed to the public for conservation purposes and safety reasons and can only be accessed through guided tours.”
- Vatnshellir: guided tours only, according to the former Environment Agency of Iceland’s cave page.
- Lofthellir: privately owned and protected; Geo Travel guides run a limited number of tours.
- Gjábakkahellir and Leiðarendi: named by Visit Iceland as accessible to the public. Adventure Vikings runs guided Leiðarendi tours; no official access page was found for Gjábakkahellir, so confirm the route and conditions before entering.
- Búri and Surtshellir: visitor access has not been verified. Read each guide before planning a visit.
- Natural ice caves in Vatnajökull: never without a glacier guide and proper safety gear, according to Visit Vatnajökull.
Lava caves are protected whether or not a guide is present. Visit Iceland says lava caves and their formations are protected by nature conservation law and that breaking anything is strictly forbidden. Visit Iceland (source checked 2026-10-30)
What do Iceland’s cave tours involve?
Iceland’s guided cave tours range from short walks on installed paths to rocky crawls. The Cave’s Víðgelmir Cave Explorer lasts 1.5 hours at difficulty 1/5 with a helmet and headlight included, The Cave (source checked 2026-10-30) while The Lava Tunnel’s Lava Falls Adventure in Raufarhólshellir lasts 3–4 hours at difficulty 4/5, with a minimum age of 12. The Lava Tunnel (source checked 2026-10-30) Geo Travel says the Lofthellir tour is not suitable for young children or people with claustrophobia. Geo Travel (source checked 2026-10-30)
| Cave | Operator | What the route involves | Age and suitability | Source |
|---|---|---|---|---|
| Vatnshellir | Summit Adventure Guides | Two spiral stairs and uneven ground, walked unsupported. Use the supplied handheld light; headlamps are not permitted. | Minimum age five. | Summit requirements (source checked 2026-09-10)Summit lighting rule (source checked 2026-09-10) |
| Víðgelmir | The Cave | Cave Explorer: 1.5 hours, difficulty 1/5, helmet and headlight included. A Húsafell shuttle is separately booked. | The operator accommodates under-sixes at the back of the group with an early turnaround if needed. | The Cave tours (source checked 2026-10-30)The Cave children rule (source checked 2026-09-10) |
| Leiðarendi | Adventure Vikings | A cave about 900 m long, reached by a walk of about 150 m; crouching and crawling. Arrange the meeting point directly if driving yourself. | Not stated in the operator facts checked. | Adventure Vikings (source checked 2026-10-30) |
| Raufarhólshellir | The Lava Tunnel | The standard visit and Lava Falls Adventure differ substantially: the adventure lasts 3–4 hours at difficulty 4/5 and requires ankle-supporting hiking boots. | Lava Falls Adventure: minimum age twelve. | Lava Falls Adventure (source checked 2026-10-30)Footwear rule (source checked 2026-10-30) |
| Lofthellir | Geo Travel | Crawling through narrow passages in a cave with persistent ice. | Not suitable for young children, people with claustrophobia or people who are not in reasonable physical condition. | Geo Travel (source checked 2026-10-30) |
When tours run and how to reach the caves
Lava-cave tour seasons in Iceland are set by each operator rather than by one national rule. Summit Adventure Guides says Vatnshellir tours are available year-round, Summit Adventure Guides (source checked 2026-10-30) and Adventure Vikings lists Leiðarendi pick-ups from 12:45 to 13:15 in summer (March–October) and from 13:45 to 14:15 in winter (November–February). Adventure Vikings (source checked 2026-10-30)
Raufarhólshellir is the only cave here with an operator-stated distance from Reykjavík: The Lava Tunnel says the tunnel is less than 30 minutes’ drive, approximately 30 km, from Reykjavík and accessible by all vehicles. The Lava Tunnel (source checked 2026-10-30) For Víðgelmir, The Cave directs drivers from Reykjavík along Road 1 towards Borgarnes, then right onto Road 50 before Borgarnes, which leads to Road 518 to Reykholt. The Cave location (source checked 2026-10-30) Vatnshellir lies in the south slopes of the Purkhólahraun lava flow, north of Malarrif, by road 574, according to the former Environment Agency of Iceland’s page. Vatnshellir Cave (ust.is) (source checked 2026-10-30) A verified distance from Reykjavík was not found for the other caves.
Operator references checked October 30, 2026: Summit Guides, The Cave, Adventure Vikings and The Lava Tunnel.
How much does a cave tour in Iceland cost?
Cave tour prices in Iceland are set by each operator and change, so confirm on the booking page. On operator pages checked October 30, 2026, a Vatnshellir tour cost ISK 5,900 for adults with children aged 5–11 free, Summit Adventure Guides (source checked 2026-10-30) and The Lava Tunnel’s pre-booked standard tour of Raufarhólshellir cost ISK 8,900 for adults. The Lava Tunnel (source checked 2026-10-30) Prices for Víðgelmir, Leiðarendi and Lofthellir were not shown on the operator pages checked.
| Tour | Adult | Reduced rates | Children | Source |
|---|---|---|---|---|
| Vatnshellir tour (Summit Adventure Guides) | 5,900 | Seniors (65+) and students 4,600; teenagers (12–17) 2,600 | Ages 5–11 free; 5-year age limit | Summit Adventure Guides (source checked 2026-10-30) |
| Raufarhólshellir standard tour, pre-booked (The Lava Tunnel) | 8,900 | Youth (6–15) 4,450 | Ages 3–6 free | The Lava Tunnel prices (source checked 2026-10-30) |
| Raufarhólshellir Lava Falls Adventure (The Lava Tunnel) | 27,900 | Not stated on the page checked | Minimum age 12 | Lava Falls Adventure (source checked 2026-10-30) |
| Víðgelmir, Leiðarendi and Lofthellir tours | Not shown on the operator pages checked | Not shown | See the operator | Operator booking pages |
Published cave tour prices are admission prices, not transfer or package quotes, and the price for your date may differ from the rate shown on the check date.
What should you wear inside an Icelandic cave?
Wear warm layers and sturdy boots inside an Icelandic cave, and follow the operator’s gear list, because conditions and rules differ by cave. Visit Iceland gives a lava-cave temperature of 0–4°C year-round, Visit Iceland (source checked 2026-10-30) while Geo Travel says the temperature inside Lofthellir ranges from 0° to −2°C. Geo Travel (source checked 2026-10-30) Summit Adventure Guides does not permit headlamps in Vatnshellir, whereas The Cave includes a helmet and headlight on its Víðgelmir tour.
- Footwear: The Lava Tunnel requires hiking boots with ankle support on the Lava Falls Adventure in Raufarhólshellir and does not allow sneakers or low-cut shoes. The Lava Tunnel (source checked 2026-10-30)
- Light: use what the operator supplies. Summit Adventure Guides supplies handheld flashlights for Vatnshellir and does not permit headlamps. Summit Adventure Guides (source checked 2026-09-10)
- Phone signal: Visit Iceland says there is usually no cell phone reception in caves, so you cannot rely on calling for help from inside. Visit Iceland (source checked 2026-10-30)
Which is Iceland’s largest lava cave?
Iceland’s largest lava cave depends on the measure. The Cave, which operates Víðgelmir, describes it as Iceland’s largest lava cave in volume. The Cave (source checked 2026-10-30) The Kalmanshellir page on ust.is, published by the former Environment Agency of Iceland and checked October 30, 2026, calls Kalmanshellir the longest known lava cave, with a cave system approximately 4 km long. Kalmanshellir (ust.is) (source checked 2026-10-30)
Kalmanshellir is not a standard visit. The same page says: “Traffic through the cave is subject to special permission from the Environment Agency.” Kalmanshellir access (ust.is) (source checked 2026-10-30) The page adds that part of the cave is closed to all traffic unless access is in the vital interest of the public. That rule is specific to Kalmanshellir; other caves set their own terms.
Iceland.org does not give a length for Víðgelmir or Raufarhólshellir, because no operator or official page checked for this guide states one.
Planning help
Iceland caves FAQs
Quick answers with safety notes where it matters.
Do I need a guided tour to visit caves in Iceland?
The answer depends on the cave. The Vatnshellir page published by the former Environment Agency of Iceland says visitors can enter only on guided tours, and Geo Travel says Lofthellir is privately owned with a limited number of tours. Visit Iceland names Gjábakkahellir and Leiðarendi as accessible to the public but says the most decorated lava caves are usually guided-only. Visit Vatnajökull says natural ice caves in Vatnajökull should never be entered without a glacier guide. Check the individual cave and operator before you go.
What should I wear inside an Icelandic cave?
Wear warm layers and sturdy boots, and check the particular tour's equipment list. Visit Iceland gives lava-cave temperatures of 0–4°C, and Geo Travel reports 0 to −2°C inside Lofthellir (both checked October 30, 2026). Lighting rules differ: Vatnshellir supplies handheld flashlights and does not permit headlamps, while Leiðarendi supplies a helmet and headlight. The Lava Tunnel requires ankle-supporting hiking boots on its Lava Falls Adventure. Do not assume one cave's gear arrangements apply to another.
What is the difference between lava caves and ice caves?
Lava caves are lava tubes; Visit Iceland says they are formed by rivers of basaltic lava flowing from a volcanic crater. Visit Vatnajökull says most ice caves in Vatnajökull form as water channels through or under the glacier and are accessible only in winter, from November and usually through March, with a glacier guide. Lofthellir is a lava cave with persistent ice formations, a different setting again. Use the operator's current route and conditions for either kind.
Are Iceland's caves suitable for people with claustrophobia?
The answer depends on the cave. Víðgelmir and Raufarhólshellir have spacious passages with installed walkways on their standard tours. Leiðarendi involves crouching and crawling, and Geo Travel says the Lofthellir tour is not suitable for young children, people with claustrophobia or people who are not in reasonable physical condition. Check each operator's tour description before booking.
When is the best time to visit Icelandic caves?
Tour seasons are set by each operator, not by one rule for all caves. Summit Adventure Guides says Vatnshellir tours are available year-round, and Adventure Vikings lists Leiðarendi pick-ups for both a March to October and a November to February season. Natural ice caves in Vatnajökull are a winter visit, from November and usually through March according to Visit Vatnajökull. Check the operator's calendar for your dates.
Which is Iceland's largest lava cave?
The answer depends on the measure. The Cave, which runs Víðgelmir, describes it as Iceland's largest lava cave in volume. The Kalmanshellir page published by the former Environment Agency of Iceland (checked October 30, 2026) calls Kalmanshellir the longest known lava cave, a system approximately 4 km long where traffic needs special permission.
For a countrywide view of Iceland’s volcanic systems, explore our Iceland statistics.