View of the 300 meter deep crater called Viti off the north coast of Iceland, Polar Regions

Crater lake Viti in winter, on Krafla volcano, Krafla geothermal area near Lake Myvatn, north Iceland, Iceland, Polar Regions

Crater of Viti a Askja, Iceland, Polar Regions

Snow covered frozen Viti (Hell) crater near Krafla power plant, Lake Myvatn, North area, Iceland, Polar Regions

The Blue Crater Lake of Viti, which appeared after an eruption in 1875, part of the sulphurous geothermal area of Namafjall, Reykjahlio, Iceland

Viti Crater, Krafla, Iceland, Polar Regions

The Krafla crater lake in Viti crater near Myvatn, Iceland, Polar Regions

The Krafla crater lake in Viti crater near Myvatn, Iceland, Polar Regions

Viti Crater on the side of Krafla mountain near Myvatn, northern Iceland, Polar Regions

Tourist at the crater rim, crater lake Viti and Oeskjuvatn in the crater of Askja volcano, volcanic landscape, mountain massif Dyngjufjoell, Icelandic highlands, Vatnajoekull National Park, Iceland, Europe

Krafla volcano on lake Viti, Nordurland eystra, north-east region, Iceland, Europe

Krafla volcano on lake Viti, steam from a geothermal power plant, Myvatn area, Nordurland eystra, north-east region, Iceland, Europe

Volcanic lake, crater lake Viti at the central volcano Krafla, Myvatn, North Iceland, Iceland, Europe

Aerial view of blue lake in the Viti volcano crater at Krafla power plant, Myvatn region, Skutustaoir, Norourland eystra, Iceland, Europe

Crater Lake Viti, Krafla, Skutustaoir, Norourland eystra, Iceland, Europe

Sulfur fumaroles, sulfureous crystals, solfatara at Crater Lake Viti, caldera Krafla, M˝vatn, Iceland, Europe

Crater lake Viti and Oeskjuvatn in the crater of the Askja volcano, volcanic landscape, Dyngjufjoell mountain massif, Icelandic highlands, Vatnajoekull National Park, Iceland, Europe

View from the Viti explosion crater over the Krafla Geothermal Area, Lake M˝vatn area, Northern Iceland, Iceland, Europe

Viti crater, Askja-Caldera, highlands, Iceland, Europe

Geothermal energy on the Viti crater, Askja, highlands, Iceland, Europe