Inca natural bridge, volcanic sediment, Mendoza district, Argentina, South America

An ephemeral pool of water in the granite riverbed of the Agua Fria River Canyon in the Agua Fria National Monument of Arizona.

A low tide aerial drone view of the sandy shore and sand banks in the estuary of the River Avon, at Bantham, on the south coast of Devon, Great Britain.

Overflooding lake Tanganjika, Kalemie, Tanganyika proince, Democratic Republic of Congo, Africa

Congo river rapids, Kinshasa, Democratic Republic of Congo, Africa

Workers extracting river sands and gravels from a river near Mangochi, Malawi, for use in house building.

Meltwater from the Russell Glacier that drains the Greenland Ice Sheet 26 km inland from Kangerlussuaq, Greenland, Polar Regions

Sand dunes blown and shaped by the wind on an outwash plain below the Russell Glacier near Kangerlussuaq in Greenland, Polar Regions

Murky river water mixing with clear sea water at Ilfracombe on the North Devon Coast, Devon, England, United Kingdom, Europe

Meltwater from the Russell Glacier that drains the Greenland Ice Sheet 26 km inland from Kangerlussuaq, Greenland, Polar Regions

Meltwater from the Russell Glacier that drains the Greenland Ice Sheet 26 km inland from Kangerlussuaq, Greenland, Polar Regions

Meltwater from the Russell Glacier that drains the Greenland Ice Sheet 26 km inland from Kangerlussuaq, Greenland, Polar Regions

Aysgarth Falls at Aysgarth in the Yorkshire Dales National Park, Yorkshire, England, United Kingdom, Europe

Aysgarth Falls at Aysgarth in the Yorkshire Dales National Park, Yorkshire, England, United Kingdom, Europe

Sandy sediments in low tide in a river close to the sea. Isla, Cantabria, Spain, Europe.

Sandy sediments in low tide in a river close to the sea. Isla, Cantabria, Spain, Europe.

River Nile Delta and Suez Canal, Egypt, satellite image

Amazon River, Manaus, Brazil

Betsiboka River, Madagascar

The Vingerklip (rock finger) and the Ugab Valley Terraces are surrounded by thornbush and mopane (Colophospermum mopane) savanna. Aerial view. Drone shot. Damaraland, Namibia

The Vingerklip (rock finger) and the Ugab Valley Terraces are surrounded by thornbush and mopane (Colophospermum mopane) savanna. Aerial view. Drone shot. Damaraland, Namibia

The Vingerklip (rock finger) and the Ugab Valley Terraces are surrounded by thornbush and mopane (Colophospermum mopane) savanna. Aerial view. Drone shot. Damaraland, Namibia

Svartifoss, "Black Waterfall, " with basalt columns, Skaftafell National Park, southeast Iceland, Iceland

Shkopet Reservoir, Liqeni i Shkopetit, Mat River, Ulez, Qarra Dibra, Albania, Europe

Drainage system on the surface of the ice sheet. The brown sediment on the ice is created by the rapid melting of the ice. Landscape of the Greenland ice sheet near Kangerlussuaq. America, North America, Greenland, danish territory

Drainage system with lake on the surface of the ice sheet. The brown sediment on the ice is created by the rapid melting of the ice. Landscape of the Greenland ice sheet near Kangerlussuaq. America, North America, Greenland, danish territory

Drainage system on the surface of the ice sheet. The brown sediment on the ice is created by the rapid melting of the ice. Landscape of the Greenland ice sheet near Kangerlussuaq. America, North America, Greenland, danish territory