A view of Askja, a huge caldera in a mountain area called Dyngjufjoll (Elevation: 4,954 feet (1,510 m)). Notice the different levels of the small crater and the lake, which is collapsed ground filled with ground water. The lake has been formed after a big eruption of the crater in front in 1875. The name of the lake is Oeskjuvatn, the crater itself is called Viti (hell).