Directions to Grjótagjá lavagrot
4 km farther along Route 1, near the Lake Myvatn, you will find Grjótagjá, a small lava cave, and especially for Game of Thrones fans, worth a stop.
Photo by: Ron Kroetz
Inside Grjótagjá, there is a hot spring with crystal-clear blue water. In the first half of the 18th century the outlaw Jón Markusson lived here. Until the 1970s Grjótagjá was a popular seaside resort. After several volcanic eruptions in the neighbourhood the temperature of the water has increased to 40 ° C, making it too hot to bathe there. (It is also forbidden).
There are two entrances to the cave. In some places the ceiling is low, so watch your head. Bring your own flashlight when visiting the cave in the evening. Also make a short climb to the top of the cave; there is a large crack in the rock, which is quite impressive.
Grjótagjá can be seen in season 3 of Game of Thrones. Here Jon Snow allied with Ygritte.