Grjótagjá
An underground lava cave on a rift, with clear blue thermal water visible in the light. It is the filming location of Jon Snow's scenes in Game of Thrones.
Grjótagjá is a small lava cave in a fissure at the boundary between the North American and Eurasian plates. Geothermal water collects inside, appearing crystal blue in the light. After volcanic activity from 1975 to 1984, the water temperature rose above 50°C. It is currently about 43 to 46°C, and the landowner prohibits swimming. The cave entrance is narrow and requires stooping to enter. A visit, mainly for photos, takes about 20 minutes. Entry is free. The cave is about 3 km from the town of Reykjahlíð and can be combined with a visit to Hverfjall.
Opening hours
All day
Nearby sights
- Hverfjall
- Mývatn Nature Baths
- Vogafjós Farm Resort
- Dimmuborgir
- Hverir (Námaskarð)
- Höfði
- Lake Mývatn
- Leirhnjúkur