The Raufarholshellir lava tube tunnel is one of the longest in Iceland
Credit Shutterstock.com/dnaveh
Credit Hotel Husafell
Credit Hotel Husafell
Credit Hotel Husafell
Last updated: 18 March, 2024
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Volcanoes aren’t just about the craters: sometimes, there’s even more to see underground.
Iceland is one of the few places on the planet where it’s possible to venture down into ‘lava tubes’. These tunnels of volcanic rock are formed around molten lava flows, usually close to eruption points. As the flows peter out, the rock surrounding them cools, leaving behind hollow tubes that can be 15m wide and hundreds of metres long.
Hiking into these subterranean structures is a seriously spooky experience: dark, cold and lined with peculiar rock formations, it feels like venturing into the lair of some gigantic, monstrous worm.
Most lava tubes can only be visited on a guided tour. Access is variable: some of the more accessible caves have walkways built into them, while others involve scrambling, sliding and uneven footing.
Recommendations
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Raufarholshellir Lava Tunnel
Iceland
Experience
One of the longest lava tunnels in Iceland – 1360m long, 30m wide and up to 10m high. The ‘Standard’ lava tunnel tour (1 hour) visits the most accessible section of the cave, while the longer ‘Adventure’ tour (3-4 hours) ventures into the deeper sections.
Adult price: £45
Good for age: 8+
Freq: monthly
Little Bjorn-Vorouhellir Lava Tunnels
Iceland
Experience
For the full-on caving experience, visit these neighbouring caves in Thingvellir National Park, including the longest of all, 1,100m-long Vorouhellir. Initially thought to be separate, the caves are actually connected – and you get to squeeze through narrow tunnels joining the two systems.
Adult price: £35
Min age 5
Good for age: 8+
Freq: monthly
Leidarendi Lava Tunnel
Iceland
Experience
This 900m-long lava tube is popular as it’s one of the nearest to Reykjavik. Guided tours explore the main cave sections, with impressive displays of stalactites and stalagmites.
Adult price: £45
Good for age: 8+
Freq: monthly
Vatnshellir Lava Tunnel
Snaefellsjokull National Park, Iceland
Experience
Way out on the Snaefellsnes Peninsula, a spiral staircase leads down into this deep lava tube – estimated to be one of Iceland’s oldest (circa 8,000 years). With a guide, it’s possible to walk around 200m into the cave: wear good shoes as the base of the cave is unstable underfoot. Tours last 45 minutes.
Adult price: £35
Min age 5
Good for age: 8+
Duration: 45 minutes
Freq: monthly
Vidgelmir Lava Tunnel
Borgarfjordur, Iceland
Experience
An accessible, family-friendly cave in the Hallmundarhraun lava field, in Borgarfjordur. It’s a great choice for kids, as most of the cave is reached via a walkway, and illuminated by fixed lighting. No squeezing, sliding or slipping required here.
Adult price: £40
Good for age: 8+
Freq: monthly
Lofthellir Lava Tunnel & Ice Cave
Lake Myvatn, Iceland
Experience
This unusual cave near Myvatn combines two geological processes in one: it’s a lava cave coated in impressive ice formations. Around 370m of the cave is accessible on foot. Don headlamps, spiked boots and waterproofs – it’s a proper, big-thrill caving experience, so expect to get wet and muddy – and be prepared to squeeze through some tight spots. Tours last 4-5 hours.
Adult price: £200
Min age 8
Good for age: 8+
Duration: 4-5 hours
Freq: monthly
Logistics
Price from: £40
Minimum age: 3
Age suitable: 8+
When: All year around
Duration: 2+ hours
Getting there & doing it
You need to book with a Reykjavik day tour company to go on a lava caving trip – you can’t do it unaccompanied or unguided.
There are a variety of locations and tours to select from, many in Thingvellir National Park, just under an hour‘s drive from Reykjavik.
Sturdy walking boots are recommended for the lava caves, as surfaces can be uneven or slippery. All equipment, including overalls and a head torch, will be provided.
When to do it
Trips run all year, but are weather dependent (as roads to Thingvellir and other sites) may be cut off in winter. Start times vary by operator.
Who to go with: organised tours
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Our selection of the best Viator tours of this attraction or activity
Explore the magnificent lava tunnel Raufarhólshellir, one of the longest and best-known lava tubes in Iceland. Located just 30-40 minutes from Reykjavík, the tunnel is easily accessible year round. Discover the inner workings of a volcanic eruption and walk along the path where lava flowed during the Leitahraun eruption, which occurred approximately 5200 years ago. Our tour is approximately one hour whereas platforms and lights have been incorporated - making the experience of visiting the cave simply breathtaking. The tour includes all necessary equipment. Choose your preferred departure time upon booking. Please note that this tour does not include pick up and is for self driving passengers only.
Explore Raufarhólshellir, one of the longest lava tunnels in Iceland, with transport to Reykjavik. An ideal half-a-day activity that combines amazing Icelandic nature just outside the capital Reykjavik. You will be provided with a helmet and headlamp and on this guided tour you will learn about and witness amazing geological features that can only be found inside a lava tube. Paths and platforms are provided making this accessible activity for most people and our lighting design has won numerous awards. Tours with transfer from Reykjavik are provided 2- 3 times a day.
Leave behind Reykjavík and journey to Raufarhólshellir Lava Tunnel for a one-hour lava cave tour, just 30 minutes away. Walk through the lava's path and learn about the tunnel's history. The lava tunnel is one of the biggest in Iceland and scenes from the film Noah were shot in the cave. This tour includes a driver/guide and safety equipment.
Embark on an unforgettable adventure combining two of Iceland’s most breathtaking experiences.
Begin your journey with a thrilling exploration of Raufarhólshellir, one of Iceland's longest and most renowned lava tunnels. Located just 45 minutes from Reykjavík, this extraordinary underground passage dazzles with vibrant colors and fascinating rock formations, offering a rare glimpse into the heart of a volcanic marvel.
Next, venture to the Silfra Fissure in the UNESCO World Heritage-listed Þingvellir National Park. Dive into crystal-clear waters for an unparalleled snorkeling adventure, where you’ll float between two continental plates in a surreal, otherworldly environment.
With an expert guide by your side, uncover the secrets of Iceland's geological wonders as you journey through a mesmerizing lava cave and immerse yourself in Silfra's pristine, dreamlike underwater world.
Explore Iceland’s ancient underground lava tunnels at Raufarholshellir lava tunnel on a caving experience with transport from Reykjavik! Hidden deep beneath the stunning Blue Mountains (Bláhnjúkur), Raufarholshellir lava tunnel is home to a volcanic wonderland of rock formations, ice and craters. Using specialist caving equipment, follow a local guide and hike through the tunnels to the cave, discovering Iceland’s otherworldly sights at their finest and witness the inner workings of a volcanic eruption.