Open crater floors in mineral bands, 120 metres of vertical descent
Hand-picked by our editors — only the best 2 crater experiences from 7 reviewed.
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6 hr
Trek across Iceland's newest lava fields with guides who witnessed the eruptions firsthand
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6 hr
Trek across fresh lava fields with a volcanologist guide and witness Iceland's newest volcanic landscapes
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6 hr
Trek across ancient lava fields and descend 120 meters into a dormant volcanic crater
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The landmarks, rooms, and views travelers on Inside the Volcano tours remember — all visible on a single visit.
A massive, 3,270-square-meter cavity large enough to fit the Statue of Liberty inside.
Descend 120 meters into the heart of the dormant volcano in an open-air elevator.
A 3km scenic hike across rugged, ancient lava formations leading to the volcano.
The cozy meeting point for the tour where guests gather for safety briefings and warm soup.
Explore evidence of the geological activity that once defined this dormant crater.
Every Inside the Volcano tour side-by-side — duration, what's included, how you redeem.
| Experience | Duration | Rating | Skip-the-line | Guide | Small group | Free cancel. | Price | |
|---|---|---|---|---|---|---|---|---|
|
Guided Experience Most popular
Fagradalsfjall Volcano Hike with Local Guides
|
6 hr | ★ 4.9 | ✓ | ✓ | ✓ | ✓ | $157 | Book → |
|
Guided Experience
Fagradalsfjall Volcano Hike with Expert Geologist
|
6 hr | ★ 4.8 | ✓ | ✓ | ✓ | ✓ | €139 | Book → |
|
Guided Experience
Thrihnukagigur Volcano Interior Hiking Experience
|
6 hr | ★ 4.8 | ✓ | ✓ | ✓ | ✓ | $441 | Book → |
All prices from verified partners. Availability and exact terms confirmed at checkout.
They complement each other; most visitors who do both call the inside the volcano tour the more thrilling geological encounter. These lava tunnel tours offer a more accessible, budget-friendly alternative for exploring subterranean volcanic conduits.
| Feature | Top pick Inside the Volcano | The Lava Tunnel |
|---|---|---|
Geological Formation |
Magma Chamber | Lava Tube |
Descent Method |
Open Cable Lift | Walk-in Entrance |
Total Time |
5–6 hours | 1–4 hours |
Average Cost |
55,500 ISK | 8,900–27,900 ISK |
Activity Level |
Moderate (Hiking) | Easy to Moderate |
| See tickets → |
Verdict: Choose the inside the volcano tour for an unparalleled vertical descent into a dormant magma chamber, or select lava tunnel tours for a grounded look at ancient subterranean flows.
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Arrive at the entrance, show your voucher on your phone, and walk in. Most tickets include priority or skip-the-line access.
Practical details for Inside the Volcano tickets straight from our verified partners — hours, access, rules, and how to get there.
Wear warm, layered clothing and sturdy, waterproof hiking boots. The temperature inside the magma chamber remains a constant 4°C (37°F) year-round.
Backpacks should be left at the base camp cabin. Only handheld items like cameras and phones are permitted during the descent.
Photography is encouraged throughout the tour. Capture the vibrant mineral walls within the chamber and share your experience.
The tour requires moderate physical fitness to complete the 3km hike across uneven volcanic terrain. This tour is not suitable for those with limited mobility.
Mobile phones are permitted. Keep ringer off inside exhibition spaces.
The minimum age for the inside the volcano tour is 8 years old. All participants must be capable of a 45–50 minute hike.
Traditional Icelandic lamb soup and vegetarian/vegan options are provided at the base camp after the descent. Coffee, tea, and water are available.
Pets are not allowed, with the exception of service animals with appropriate documentation.
Last entry is typically 1 hour before closing. Check the specific ticket for timing.
Best time to go, insider tips, nearby landmarks, and the cancellation fine print — flip through to skim what matters to you.
Flexible, no hidden fees.
Full cancellation fee applies if cancelled 1 day or less before the event. Written notice via email is required for all cancellations.
Þríhnúkagígur is the only volcano on Earth whose magma chamber you can enter standing upright. The hollow formed 4,000 years ago when molten rock drained back into the mantle instead of solidifying in place, leaving a cathedral-scale void 120 metres deep and 50 metres wide.
Geologists discovered the chamber in 1974, but public access did not begin until 2012, when engineers installed the open-platform lift that now lowers visitors through the throat of the crater.
The inside the volcano tour Iceland reviews consistently highlight the chamber's mineral strata. Iron oxides stripe the walls in rust and crimson; copper salts leave veins of green and turquoise; sulfur deposits bloom yellow near old steam vents. The colours intensify with depth, and natural light from the crater mouth reaches only the upper third of the descent. Below that threshold, floodlights mounted on the chamber floor reveal textures invisible from above: ropy pahoehoe flows frozen mid-drip, scoria pockets filled with volcanic glass, and columnar basalt fractured into geometric grids.
Þríhnúkagígur sits within Bláfjöll Country Park, a geothermal zone studded with cinder cones and lava fields. The volcano itself is dormant, its last eruption predating Iceland's settlement. Volcanologists classify it as a shield volcano, built by repeated fluid lava flows rather than explosive eruptions. The magma chamber's emptiness is an anomaly—most chambers collapse or fill with solidified rock. Þríhnúkagígur's survival depends on the chamber walls' structural integrity and the absence of tectonic pressure from below.
Access requires a 3.2-kilometre hike across rough lava terrain from the Bláfjöll trailhead, followed by the 6-minute lift descent and 30 minutes on the chamber floor. The tour operates May through October when weather permits safe hiking and crater access. Inside the volcano tour from Bláfjöll departs between 08:00 and 14:00, allowing daylight for the return trek. Group sizes cap at twelve to preserve the chamber's acoustic stillness and limit environmental wear. The lift platform is open-sided, and temperatures inside the chamber hold steady near 5°C year-round regardless of surface conditions.
"Þríhnúkagígur is the only volcano on Earth whose magma chamber you can enter standing upright."
A step-by-step walkthrough of Inside the Volcano tickets — what you'll see, how long each stage takes, and the details that matter.
You meet your guide at the Bláfjöll basecamp, where you collect helmets and harnesses before the 50-minute hike across the lava field begins. The trail follows cairns through a landscape of fractured basalt and moss-covered rubble, gradually ascending toward the crater rim.
Þríhnúkagígur's cone rises ahead, its slopes black against the sky.
At the crater mouth, the open-platform lift waits. You step onto the steel mesh floor, grip the railing, and begin the descent. Daylight fades as the walls close in—first grey, then rust-red, then striped with mineral colour. The lift stops 120 metres down, and you step onto the chamber floor. The space opens in all directions: walls curve upward like the interior of a geode, and floodlights cast shadows across ridges of frozen lava.
You walk the perimeter, pausing where the guide points out sulfur veins and steam vent scars. The air is cool and still. Thirty minutes pass before the lift recalls you to the surface. The hike back to basecamp takes another hour, retracing the cairn line through the lava field as the volcano recedes behind you.
The attraction is open daily from 08:00–16:00. We recommend booking your inside the volcano tour during the 08:00–14:00 arrival window.
We highly recommend booking your inside the volcano tour in advance as availability is limited and tours often sell out.
Yes, the minimum age for the inside the volcano tour is 8 years old.
Dress in layers with warm, waterproof outdoor clothing and sturdy hiking boots, as it is 4°C (37°F) inside the crater.
Large bags must be left at base camp; you may only take small items like cameras inside the volcano.
Yes, you are encouraged to take photos of the magma chamber during your inside the volcano tour.
The tour requires a 3km hike over uneven terrain; while not steep, moderate fitness is essential for the inside the volcano tour.
The meeting point is at a ski cabin in the Bláfjöll Country Park; self-driving or pre-booked transfer is required for the inside the volcano tour.
Yes, the 55,500 ISK entrance fee includes traditional Icelandic lamb soup, beverages, and guide services.
Guides will provide instructions based on conditions; the tour is conducted with safety as the priority for all inside the volcano tour guests.
