NORTH ICELAND
Grjótagjá
Small lava cave containing striking geothermal water near Lake Mývatn, once used for bathing but now a viewing-only attraction.
CavesGeothermalNature
About Grjótagjá
Grjótagjá was historically used as a geothermal bathing cave. Geological activity between 1975 and 1984 caused the water temperature to rise considerably, and it is no longer considered a bathing location. Visitors come instead to view the clear geothermal water inside the lava fissure.
Our practical tips
✓This is for looking, not bathing.
✓The cave is small, so be considerate when other visitors are waiting.
✓Take care moving across the uneven lava around the entrance.
Getting there and visiting
Access
The cave is small and access involves uneven rock. Bathing is prohibited.