GeologicalInterest 5/5Guide required
Þríhnúkagígur
Þríhnúkagígur is a dormant volcano near Bláfjöll where an open cable lift lowers visitors 120 metres into a vast, multicoloured magma chamber, the only place on Earth known to offer safe access into a volcano's interior. The tour includes a 3 km guided hike each way across a lava field to reach the crater, followed by about 30 minutes inside the chamber.
Region
Southwest Iceland
Coordinates
63.9984° N, 21.6989° W
Important to know
- High danger
- A 120 m open cable-lift descent, remote highland terrain, a demanding hike, and changeable mountain weather make this one of the more serious guided adventure tours in Iceland, though safety is professionally managed.
- Guide required
- Tours are operated exclusively by Inside the Volcano (3H-Travel); the crater cannot be accessed independently and guides operate the lift.
- Seasonal access
- Tour operates May to October only.
Plan the stop
- Allow
- 4 hrs
- Approach
- 3 km · 48 min. Guided hike from the Breiðabliksskáli meeting point in Bláfjöll to the volcano's base camp, about 3 km each way over rocky ground, taking roughly 45-50 minutes per the operator.
Accessibility
- Wheelchair · None
- The tour requires a 3 km hike each way across a lava field and a cable-lift descent; there is no wheelchair-accessible route.
- Limited mobility · None
- Participants must complete a moderate 45-50 minute hike over rocky, sometimes wet and muddy terrain, plus a steep final incline, before descending in the lift.
- Sensory · Partial
- The open-air lift descent, darkness inside the chamber, and remote highland weather can be intense, though guides manage safety gear and pacing throughout.
- Cognitive · Partial
- A structured guided tour with a safety briefing, harness fitting, and constant guide presence makes the experience manageable despite its unusual setting.
Why it matters
The volcano's magma chamber emptied after its last eruption more than 4,000 years ago, leaving the hollow void discovered by cave explorer Árni B. Stefánsson in 1974; the site opened for public tours in 2012 and quickly drew international attention as a singular geological attraction.