Waterfall in the ice of Potter glacier, Tierra del Fuego, Chile, South America

Mountain landscape on Kilimanjaro, 5895 metres, UNESCO, highest mountain in Africa and one of the Seven Summits, Tanzania

Glacial iceberg detail from ice calved off the Sawyer Glacier in Tracy Arm, Southeast Alaska, United States of America

Glacial iceberg detail from ice calved off the Sawyer Glacier in Tracy Arm, Southeast Alaska, United States of America

Glacial iceberg detail from ice calved off the Sawyer Glacier in Tracy Arm, Southeast Alaska, United States of America

Glacial iceberg detail from ice calved off the Sawyer Glacier in Tracy Arm, Southeast Alaska, United States of America

Glacial iceberg detail from ice calved off the Sawyer Glacier in Tracy Arm, Southeast Alaska, United States of America

Glacial iceberg detail from ice calved off the LeConte Glacier near Petersberg, Southeast Alaska, United States of America

Glacial iceberg detail from ice calved off the LeConte Glacier near Petersberg, Southeast Alaska, United States of America

Glacial iceberg detail from ice calved off the LeConte Glacier near Petersberg, Southeast Alaska, United States of America

View of Gullfoss Waterfall on the Hvita River in winter, Western Region, Iceland

View of Gullfoss Waterfall on the Hvita River in winter, Western Region, Iceland

Continental drift between North American and Eurasian tectonic plates, Thingvellir National Park, UNESCO, in winter, Western Region, Iceland

Harp seal (Pagophilus groenlandicus), hauled out on the pack-ice in between Iceland and Greenland in the Denmark Strait, Denmark

Aerial of Potter glacier, Tierra del Fuego, Chile, South America

Floating icebergs, Ilulissat Icefjord, UNESCO World Heritage Site, Western Greenland, Denmark, Polar Regions

Unusual window formation in iceberg showing Booth Island in the background on the western side of the Antarctic Peninsula, Antarctica, Polar Regions

A view of Isfjorden (Ice fjord) on the western side of Spitsbergen Island in the Svalbard Archipelago, Norway

View of geysers at Geysir Hot Springs in winter, Western Region, Iceland

Continental drift between North American and Eurasian tectonic plates, Thingvellir National Park, UNESCO, in winter, Western Region, Iceland

Aerial of Potter glacier, Tierra del Fuego, Chile, South America

Hole in an iceberg, Belcher island, Devon island, Nunavut, Canadian Arctic, Canada, North America

A view of Isfjorden (Ice fjord) on the western side of Spitsbergen Island in the Svalbard Archipelago, Norway

A view of Isfjorden (Ice fjord) on the western side of Spitsbergen Island in the Svalbard Archipelago, Norway

A view of Krossfjorden (Cross Fjord) on the northwestern side of Spitsbergen Island in the Svalbard Archipelago, Norway

Ice detail, River Etive, Rannoch Moor, Highland, Scotland, United Kingdom

Ice detail, River Etive, Rannoch Moor, Highland, Scotland, United Kingdom

Adult polar bear (Ursus maritimus) in Holmabukta on the northwest coast of Spitsbergen in the Svalbard Archipelago, Norway

Aguila glacier, Tierra del Fuego, Chile, South America

Views of Gold Harbor on South Georgia Island, Southern Ocean

Aerial of the Eqi glacier, Western Greenland, Denmark, Polar Regions

Lamplugh Glacier showing meltwater cave, Glacier Bay National Park, southeast Alaska, USA.

Hoar frost at dawn, Red Screes, Cumbria, England, United Kingdom, Europe

Hoar frost at dawn on the summit of Red Screes, Cumbria, England, United Kingdom, Europe

Snow on remote rock formations, Myrdalsjokull Glacier, South Iceland, Iceland

A tight squeeze for travelers exploring New Zealand's famous Franz Josef Glacier, iwth its blue Ice, deep crevasses, caves and tunnels that mark the ever changing ice formations; West Coast, New Zealand

Travelers entering an ice tunnel while exploring the famous Franz Josef Glacier with its, blue ice caves, deep crevasses and tunnels that mark the ever changing ice formations; West Coast, New Zealand

Travelers exploring the famous Franz Josef Glacier with its, blue ice caves, deep crevasses and tunnels that mark the ever changing ice formations; West Coast, New Zealand

Frozen ice formations on the summit of Galtymor mountain with a celtic cross in winter, Galty Mountains; County Tipperary, Ireland

View of the blue ice formations at the Knik Glacier in Alaska, Kenai Peninsula Borough, Alaska, United States of America

Blue ice formations on Knik glacier against a bright blue sky, Alaska, United States of America

Spiky ice formations along the ice wall of the Matanuska Glacier on a cloudy day, Sutton, Alaska, United States of America

Blue ice formations on Knik glacier against a bright blue sky, Alaska, United States of America

Person stands on the edge of an ice formation in the ocean and looks out to the vast seascape and horizon

Time lapse view of river flowing over icy rock formations, Gullfoss, Iceland

Scuba diver under ice and ice formation, Arctic circle Dive Center, White Sea, Karelia, northern Russia

A technician goes into a raised square building on an orange metal structure. An Italian technician specialising in radio and telecommunications goes into the shelter that houses the VSAT antenna, the device that connects the station to the Internet by satellite. This is the station's only link with the outside world. Most of the buildings are elevated to prevent the formation of snowdrifts caused by wind-blown snow. Concordia Antarctic Research Station, Dome C plateau, East Antarctica.

Frozen ground of Dome C, and sastrugis. Sastrugis are wind-blown snow formations. The wind is not extremely strong in these high-altitude locations. Concordia Station, Antarctic

Scuba diver under ice and ice formation, Arctic circle Dive Center, White Sea, Karelia, northern Russia