Mývatn

The area around lake Mývatn is remarkable for its range of geological features, including volcano craters, fissures, hot springs, lava caves and pseudocraters.

 

Grjótagjá fissure, with the huge volcano crater of Hverfell in the background

 

 

Troll-like lava formations

 

Lava cave, with my backpack for scale