Milan Radisics / Aerial shot of rootless cones or pseudocraters, formed by steam explosions as flowing hot lava crosses over a wet surface, South Iceland, August 2018.

Morley Read / Aerial timelapse rising over misty cloudforest covering the slopes of Sumaco Volcano, with a water filled crater lake in foreground, Napo Province, Ecuador, 2018. (non-ex)

Derek Galon / High altitude Boeri Lake in old volcano crater, Morne Trois Pitons National Park, Dominica, West Indies, Windward Islands.

Vincent Grafhorst / Minden / Crater of active volcano at twilight, Erta Ale, Danakil Depression, Ethiopia

Vincent Grafhorst / Man looking into crater at night, Mount Nyiragongo, Virunga National Park, Democratic Republic of the Congo

Vincent Grafhorst / Lava in volcanic crater, Mount Nyiragongo, Virunga National Park, Democratic Republic of the Congo

Guy Edwardes / Quilota Crater Lake, Cotopaxi Province, Ecuador, September 2010.

D. Parer & E. Parer-Cook / Volcanic caldera, Daphne Island, Galapagos Islands, Ecuador

Nick Turner / Crater lake with reflections of clouds in the water, Queen Elizabeth National Park, Uganda, January 2009.

Inaki Relanzon / Volcanic eruption, Eyjafjallajokull, near the Myrdalsjokull glacier, South Iceland, april 2010.

Inaki Relanzon / Volcanic eruption, Eyjafjallajokull, near the Myrdalsjokull glacier, South Iceland, april 2010.

Inaki Relanzon / Volcanic eruption, Eyjafjallajokull, near the Myrdalsjokull glacier, South Iceland, april 2010.