Aerial view of Kaieteur Falls in full spate, Guyana, South America

Aerial view of Kaieteur Falls and the Potaro River in full spate, Guyana, South America

Thornton Force in full flow as the River Twiss cascades down rocks and trees, North Yorkshire, Yorkshire, England, United Kingdom, Europe

Herd of four African Cape buffalos, Grumeti,Tanzania, East Africa

Herd of four African Cape buffalos, Grumeti,Tanzania, East Africa

Stockghyll Force in full flood in summer Ambleside, Lake District, Cumbria, England, United Kingdom, Europe

Stockghyll Force in full flood in summer Ambleside, Lake District, Cumbria, England, United Kingdom, Europe

Stockghyll Force in full flood in summer Ambleside, Lake District, Cumbria, England, United Kingdom, Europe

Stockghyll Force in full flood in summer Ambleside, Lake District, Cumbria, England, United Kingdom, Europe

Eruption of the Fimmvoer√∞uh√°ls Volcano, between M√Ωrdalsjoekull and Eyjafjallajoekull, Highland, Iceland, Europe

View from M√Ωrdalsjoekull Glacier towards the volcanic ash cloud from the eruption of the Fimmvoer√∞uh√°ls Volcano, between M√Ωrdalsjoekull and Eyjafjallajoekull, Highland, Iceland, Europe

Evacuation from the glacier, eruption of the Fimmvoer√∞uh√°ls Volcano, between M√Ωrdalsjoekull and Eyjafjallajoekull, Highland, Iceland, Europe

People with Super-Jeeps observing the lava flow from the eruption of the Fimmvoer√∞uh√°ls Volcano, between M√Ωrdalsjoekull and Eyjafjallajoekull, Highland, Iceland, Europe

Man standing at the Dettifoss waterfall on the Joekuls√° √° Fjoellum river, Nor√∞urland eystra region, or north-east region, Iceland, Europe

View from M√Ωrdalsjoekull Glacier towards the volcanic ash cloud from the eruption of the Fimmvoer√∞uh√°ls Volcano, between M√Ωrdalsjoekull and Eyjafjallajoekull, Highland, Iceland, Europe

Molten pahoehoe type lava flowing from a crack in the East Rift Zone towards the sea, lava field of the Kilauea shield volcano, Hawai'i Volcanoes National Park, Kalapana, Hawai'i, USA

Tornado, waterspout, overlooking the Mediterranean Sea, off the coast of the Cote d'Azur, France, Europe

Molten pahoehoe type lava flowing from a crack in the East Rift Zone towards the sea, lava field of the Kilauea shield volcano, Hawai'i Volcanoes National Park, Kalapana, Hawai'i, USA

Tornado, waterspout, overlooking the Mediterranean Sea, off the coast of the Cote d'Azur, France, Europe

Eruption of the Fimmvoer√∞uh√°ls Volcano, between M√Ωrdalsjoekull and Eyjafjallajoekull, Highland, Iceland, Europe

F-16 Fighting Falcon under full thrust on take off, military aircraft

Darvaza Gas Crater, Turkmenistan, Central Asia

Tornado, waterspout, overlooking the Mediterranean Sea, off the coast of the Cote d'Azur, France, Europe

Tornado, waterspout, overlooking the Mediterranean Sea, off the coast of the Cote d'Azur, France, Europe

Erupting volcano between Myrdalsjoekull and Eyjafjallajoekull glaciers, Iceland, Europe

Gathering storm clouds