George Sanker / Ellis River high in White Mountain National Forest. New Hampshire, October 2012.

Philippe Clement / Strange rock formations created by water erosion at the Orgues d'Ille-sur-Tet in the Pyrenees-Orientales, Pyrenees, France, June 2012

Jack Dykinga / Colorado River Delta, with watercourse sculpted patterns eroded into the salt / silt flats near the Sea of Cortez, La Reserva del Golfo, Baja, Mexico

Jack Dykinga / Cibecue Creek waterfall pouring through canyon narrows, White Mountain Apache Reservation, Arizona, USA

Graham Eaton / Underwater landscape within a mountain stream, showing water turbulence, Snowdonia NP, Gwynedd, Wales, UK, December

Brent Stephenson / Steep rock walls of the Tracy Arm, carved out by glacial action over millions of years. Alaska, United States, July 2010.

Juergen Freund / Small, tree-covered islet. This is a karst limestone formation with layers eaten away by water. Raja Ampat, West Papua, Indonesia, February 2010

Mark Taylor / 'The Marble Cathedrals' - marble rocks dissolved and sculpted by water. Rio Tranquilo, Chile, March 2010.

Brent Stephenson / The fallen Moai at Ahu Hanga Tetenga with the coastline in the background. Hanga Tetenga, Easter Island, October 2009.

Ross Hoddinott / Godrevy Lighthouse at sunset, seen through rocksand rockpool in the foreground. Nr Hayle, Cornwall, UK, June 2009

Alex Hyde / The Fairy Pools, on the Allt Coir' a' Mhadaidh river running down from the Cullin Hills, Glen Brittle, Isle of Skye, Inner Hebrides, Scotland, UK, February 2010.

Alex Hyde / The Fairy Pools, on the Allt Coir' a' Mhadaidh river running down from the Cullin Hills, Glen Brittle, Isle of Skye, Inner Hebrides, Scotland, UK, February 2010.

Eric Baccega / Flowerpot sea stacks with outgoing tide at Hopewell Rocks. The world's highest tides. Bay of Fundy, New Brunswick, Canada, September 2010

Floris van Breugel / A dark passageway of a narrow flooded slot canyon, Zion National Park, Utah, USA. November 2009.

Jouan & Rius / View of Pinnacles desert after heavy rainfall, Nambung National Park, Western Australia. August 2009

Jouan & Rius / Kermit pool in Hancock gorge, Karijini National Park, Pilbara, Western Australia. August 2009

Jouan & Rius / Cascade flowing in Hancock gorge, Karijini National Park, Pilbara, Western Australia. August 2009

Tim Laman / Iceberg showing wave erosion, Antarctica, January

Stephen Dalton / Water splashing over a rock, backlit, UK

Thomas Lazar / Ice hanging from arch in sea cave carved in soft sandstone cliffs, frozen lake, Squaw Bay, Lake Superior, Apostle Islands National Lakeshore, Wisconsin, USA, February 2009

Wild Wonders of Europe / Bergmann / Aldeyjarfoss waterfall on the Skjalfandafljot river, Thingeyjarsyslur, Iceland, August 2009

Jack Dykinga / Tumbleweed, dried and sun bleached, in the water sculpted Antelope Canyon, Navajo Indian Reservation, Arizona, USA

Wild Wonders of Europe / Cairns / Aerial view of the Laitaure delta, Sarek National Park, Laponia World Heritage Site, Lapland, Sweden, September 2008 WWE BOOK. WWE INDOOR EXHIBITION

Kirkendall-Spring / Sea surf against sandstone cliffs and rock formationa on the shore at Cape Kiwanda State Park, Oregon, USA

Kirkendall-Spring / Rialto Beach, Olympic NP, Washington, USA

Kirkendall-Spring / Sea stack studded beach, Bandon, Oregon, USA

Kirkendall-Spring / Long exposure of surging tide on the beach at Spooner's Cove, Montana De Oro State Park, California, USA

Kirkendall-Spring / Waves surging onto a pebble beach, Monterey Coast, California, USA

Kirkendall-Spring / Long exposure of the view across Spooner's Cove in the mist, Montana De Oro State Park, California, USA

Yva Momatiuk & John Eastcott / Massive iceberg floating, smashing into waves and melting rapidly due to gobal warming and rising temperatures of sea and air, near Cumberland Bay, South Georgia Island, Southern Ocean, Antarctic Conv...

Jack Dykinga / Water from flash floods cascades down Marble Canyon into the Colorado River, Grand Canyon NP, Arizona, USA

Jack Dykinga / Water running down Matkatimiba Canyon towards the Colorado River, Grand Canyon NP, Arizona, USA

Bob Barbour / Man overlooking stormy surf on rocks, northern California

Yva Momatiuk & John Eastcott / Small sandstone canyon carved by water, exposes strong pattern of parallel lines, Vermilion Cliffs National Monument, Colorado Plateau, Utah

Claus Meyer / Meandering river in forest, Amazon, Brazil

Juan Carlos Munoz / Glacial melt water seen from the air. Deshielo glaciar. Southern Iceland, Europe, July 2009.

Ross Hoddinott / 2020VISION / Poorly maintained river banks, eroded by cattle, muddy and the polluting water, with cow pats on the river bank, River Ottery, North Petherwin, Launceston, Cornwall, UK. April 2012.

Staffan Widstrand / Mimmi Widstrand near rauk / stack on beach at sunset, Faro, Gotland, Sweden's largest island August 2010 Model released

Jabruson / Erosion of murram road after rainstorm in wet season, Boukoko village, Central African Republic March 2012

Philippe Clement / Strange rock formations created by water erosion at the Orgues d'Ille-sur-Tet in the Pyrenees-Orientales, Pyrenees, France, June 2012

Philippe Clement / Strange rock formations created by water erosion at the Orgues d'Ille-sur-Tet in the Pyrenees-Orientales, Pyrenees, France, June 2012

Philippe Clement / Strange rock formations created by water erosion at the Orgues d'Ille-sur-Tet in the Pyrenees-Orientales, Pyrenees, France, June 2012

Philippe Clement / Strange rock formations created by water erosion at the Orgues d'Ille-sur-Tet in the Pyrenees-Orientales, Pyrenees, France, June 2012

Philippe Clement / Strange rock formations created by water erosion at the Orgues d'Ille-sur-Tt in the Pyrenees-Orientales, Pyrenees, France, June 2012

Jack Dykinga / Stalagmites and stalactites with turquoise waters of Cenote Papakal, near Merida, Yucatan, Mexico

Luiz Claudio Marigo / Santo Antonio Wall / Paredao de Santo Antonio and Salto River with people bathing in water at Ibitipoca State Park, municipality of Minas Gerais State, Southeastern Brazil, February 2012.

John Beatty / 2020VISION / Plastic gully blocking structures in eroded peat moorland drainage channels.

Erlend Haarberg / Photographer photgraphing sea arch in winterstorm from coastal rocks, Arnarstapi, Snaefellsnes Peninsula, Iceland, January 2011

Erlend Haarberg / Relatively dry River bed, Hraunfossar, Iceland, September 2010

Juan Carlos Munoz / Mineral-rich geological debris piles, near the banks of the Rio Tinto, which becomes coloured by dissolved minerals, primarily iron. Andalusia, Spain, January 2008.

Juan Carlos Munoz / Mineral-tolerant plants growing by a pool coloured by dissolved minerals. Near the Rio Tinto, Andalusia, Spain, January 2008.

Juan Carlos Munoz / Mineral rich rocks near the Rio Tinto, coloured by dissolved minerals, primarily iron. Andalusia, Spain, January 2008.

Juan Carlos Munoz / Pool near the Rio Tinto, coloured by dissolved minerals, primarily iron. Andalusia, Spain, January 2008.

Juan Carlos Munoz / Rio Tinto, and geology coloured by dissolved minerals, primarily iron, and bankside eroding hills. Andalusia, Spain, January 2008.

Graham Eaton / An underwater view of a mountain stream, showing water turbulence around rocks, Snowdonia NP, Gwynedd, Wales, UK, December

Graham Eaton / View of the underwater landscape within a mountain stream, showing water turbulence, Snowdonia NP, Gwynedd, Wales, UK

Graham Eaton / Underwater view of a fast flowing stream, showing undercut bank on the outside of a small meander, Snowdonia NP, Gwynedd, Wales, UK, February

Philippe Clement / Sea stacks at the Plage des Cinq Pineaux at Saint-Hilaire-de-Riez, La Vendée, Pays de la Loire, France September 2011

Chien Lee / River flowing through canyon, Western Australia, Australia

Suzi Eszterhas / Polluted murky water of main river meeting clean black water of Sekonyer River, Tanjung Puting National Park, Indonesia

Suzi Eszterhas / Polluted murky water of main river meeting clean black water of Sekonyer River, Tanjung Puting National Park, Indonesia

Christophe Courteau / Iceberg floating, eroded by sun and water, King's Bay, Spitzbergen, Svalbard, Norway, July

Kathryn Jeffs / Iceberg showing wave erosion off the Antarctic peninsula, Antarctica, January 2009, Taken on location for BBC Frozen Planet series

Jeff Wilson / Aerial view of tundra landscape, Ellesmere Island, Nunavut , Canada, June 2008. Taken on location for BBC series, Frozen Planet, Summer

Lisa Hoffner / Where water once ran: Aerial of erosion that scars the land near a Samburu manyatta in drought stricken Northern Kenya. August 2009.

Bryan and Cherry Alexander / Blue iceberg rounded by sea water, Antarctica, 2009.

Bryan and Cherry Alexander / Light catches an area of solifluction and erosion in the Dombrava River Valley. Hurry Inlet, Scoresbysund, East Greenland, September 2005.

David Woodfall / Boulder covered in moss eroded by water in River Marteg. Marteg valley, Cambrian mountains, Radnorshire Wildlife Trust, Wales, UK, November.

Nick Upton / White limestone cliffs with sections that have collapsed into the sea. "Le Grain de Sable" (grain of sand) sea stack is central. Bonifacio, southern tip of Corsica, France, May 2010.

Nick Upton / White limestone cliffs with sections that have collapsed into the sea. "Le Grain de Sable" (grain of sand) sea stack is to the right. Bonifacio, southern tip of Corsica, France, May 2010.

Brent Stephenson / Face of the glacier with massive cracks and seracs, showing layers of ice. Hubbard Glacier, Alaska, United States, July 2010.

Eric Baccega / Floe edge of melting icepack with eroding coastal mountains. Arctic Bay, Baffin Island, Nunavut, Canada, June.

Juergen Freund / Small, tree-covered island. This is a karst limestone formation with layers eaten away by water. Raja Ampat, West Papua, Indonesia, February 2010.

Mark Taylor / Ko Tapu limestone pinnacle islet. Phang Nga Bay, Thailand, December 2010.

Mark Taylor / Long-tail boat and limestone cliffs. Koh Phi Phi, Thailand, December 2010.

Nick Upton / Tree canopy encircling Mostnica waterfall cascading down karst limestone rockface, Julian Alps, Triglav National Park, Slovenia, July 2010.

Nick Upton / Turbulent water of the Soca river carving through karst limestone rocks at Velika Korita gorge, with overhanging vegetation, Julian Alps, Triglav National Park, Slovenia, July 2010.

Nick Upton / Underground waterfalls on the Reka river as it flows through Velika Dolina (the big valley) at the entrance to Scocjan caves, a Ramsar wetland of international importance, Slovenia, July 2010.

Nick Upton / Soca river flowing through karst limestone rocks at Velika Korita gorge, Julian Alps, Triglav National Park, Slovenia, July 2010.

Nick Upton / Soca river flowing through karst limestone rocks at Velika Korita gorge, Julian Alps, Triglav National Park, Slovenia, July 2010.

Inaki Relanzon / Aerial view of river valley in South Iceland, April 2010

Orsolya Haarberg / Puntaelva river and eroded rocks in the Reisa valley, Nordreisa, Troms, Norway

Orsolya Haarberg / Coastal rock formations, Tomma Island, Nesna, Helgeland, Nordland, Norway, July 2009

Orsolya Haarberg / Marmorslotte Marble formations in the riverbed of the Glomaga river, Saltfjellet-Svartisen National Park, Rana, Nordland, Norway, July 2009

Eric Baccega / Tourists on the beach near Flowerpot sea stacks with outgoing tide at Hopewell Rocks. The world's highest tides. Bay of Fundy, New Brunswick, Canada, September 2010

Eric Baccega / Upper Salmon river at outgoing tide, Bay of Fundy shores at Alma, New Brunswick, Canada, September 2010

Eric Baccega / Flowerpot sea stacks with outgoing tide at Hopewell Rocks. The world's highest tides. Bay of Fundy, New Brunswick, Canada, September 2010

Eric Baccega / Flowerpot sea stacks with outgoing tide at Hopewell Rocks. The world's highest tides. Bay of Fundy, New Brunswick, Canada, September 2010

Eric Baccega / Flowerpot sea stacks with outgoing tide at Hopewell Rocks. The world's highest tides. Bay of Fundy, New Brunswick, Canada 2010

Eric Baccega / Beach at Cap Rouge at sunset. Cap Breton Highlands National Park, Nova Scotia, Canada, September 2010

Eric Baccega / Flowerpot sea stacks with outgoing tide at Hopewell Rocks. The world's highest tides. Bay of Fundy, New Brunswick, Canada, September

Eric Baccega / Gros Morne mountain. Gros Morne National Park, Newfoundland, Canada, September 2010

Eric Baccega / Gros Morne mountain. Gros Morne National Park, Newfoundland, Canada, September 2010

Angelo Gandolfi / Rugged and colourful coast showing geological strata and erosion. Capraia island, National Park of the Tuscany archipelago, Italy, May 2010

Angelo Gandolfi / Rugged and colourful coast showing geological strata and erosion. Capraia island, National Park of the Tuscany archipelago, Italy, May 2010