Iceberg detail in and around the Antarctic Peninsula during the summer months, Southern Ocean, Polar Regions

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

Snow-covered mountains and glacial meltwater lake in Gold Harbor, South Georgia, Polar Regions

Perito Moreno Glacier, UNESCO World Heritage Site, around El Calafate, Santa Cruz province, Patagonia, Argentina, South America

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

Aerial view of the Santa Cruz River around El Calafate, Patagonia, Argentina, South America

Snow-covered mountains and glacial meltwater lake in Gold Harbor, South Georgia, Polar Regions

Snow-covered mountains and glacial meltwater lake in Gold Harbor, South Georgia, Polar Regions

Glacial meltwater tunnel in iceberg showing sculpted water flow patterns, Spitsbergen, Svalbard, Arctic, Norway, Scandinavia, Europe

Walkers on the Tour Du Mont Blanc cross a suspension bridge across the meltwater river from the Bionnassay glacier;

Colony of king penguins (Aptenodytes patagonicus) at mouth of glacial meltwater stream, St. Andrews Bay, South Georgia, South America

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

Godafoss waterfall in northern Iceland near Akureyri, Iceland, Polar Regions

Glacier meltwater forms a small waterfall in Tracy Arm in southeast Alaska, USA.

Glacier meltwater forms a small waterfall in Tracy Arm in southeast Alaska, USA.

Godafoss waterfall in northern Iceland near Akureyri, Iceland, Polar Regions

Godafoss waterfall in northern Iceland near Akureyri, Iceland, Polar Regions

Taku Glacier, Alaska (1 of 2)

Taku Glacier Retreating (2 of 2)

Scenic landscape of glacial meltwater running through andesite lava river channel in highlands of Iceland

Blue glacial ice is exposed inside an ice cave at the terminus of Mendenhall Glacier, Mendenhall Lake, Tongass National Forest, Alaska, United States of America