Guy Edwardes / Path towards the coastguard cottages and the Seven Sisters Chalk Cliffs. Seaford Head Nature Reserve, East Sussex, UK, May 2009. *NOT AVAILABLE FOR BOOK COVER USE IN GERMANY, AUSTRIA AND SWITZERLAND U...

Peter Cairns / 2020VISION / Seven Sisters chalk cliffs, South Downs, England.

David Noton / The white cliffs at Studland, Isle of Purbeck, Jurassic Coast, Dorset, England, UK. November 2011

Merryn Thomas / Silhouetted people walking along Three Cliffs Bay, Gower Peninsula, South Glamorgan, Wales, January 2012. No release available.

Nick Turner / Walkers on the South West Coast Path National Trail near Durdle Door, Dorset, UK, May 2009.

Kathryn Jeffs / Cliff at edge of tabular iceberg, Antarctica, February 2009, Taken on location for BBC Frozen Planet series

Guy Edwardes / Path towards the coastguard cottages and the Seven Sisters Chalk Cliffs. Seaford Head Nature Reserve, East Sussex, UK, July 2009.

Mark Hamblin / 2020VISION / Waves crashing over rocks, coastline near Point of Stoer, Assynt, Sutherland, NW Scotland, UK, October. Did you know? 20 million people visit UK coastlines each year.

Juergen Freund / Outrigger boat in Big Lagoon, with its karst limestone cliffs, emerald waters and shallow coral reefs in the white sand. North Palawan, Philippines, May 2009.

Jerry Monkman / A man climbs "Top of the Prow" rock on Cathedral Ledge. Echo Lake State Park, White Mountains, in North Conway, New Hampshire, USA. October 2009, Model released

Jerry Monkman / A man climbs "Top of the Prow" rock on Cathedral Ledge. Echo Lake State Park, White Mountains, in North Conway, New Hampshire, USA. October 2009, Model released

Jerry Monkman / A man rock climbing near the top of Cathedral Ledge. Echo Lake State Park, White Mountains, in North Conway, New Hampshire, USA. October 2009, Model released

Jack Dykinga / Scarlet monkey flowers {Mimulus cardinalis} and White firs {Abies concolor} at base of steep canyon walls, Fork North Creek, Zion National Park, Utah, USA

Luis Quinta / White stork {Ciconia ciconia} adult landing at nest with chicks on cliff, Costa Vicentina, Alentejo, Portugal

John Downer Productions / Lighthouse and white cliffs at Beachy Head, Sussex, UK

David Noton / Dawn, Old Harry and his wife. The Foreland, Studland, Dorset. English coastal scene.

Gavin Hellier / People enjoying sunset in village of Oia (La), Santorini (Thira), Cyclades Islands, Aegean Sea, Greece, 2010

Gavin Hellier / White cliffs of Dover viewed from cross channel ferry, Kent, UK 2009

Robert Thompson / White park bay, North Antrim coastline, Northern Ireland, UK. December 2012

Mark Hamblin / 2020VISION / Oxeye daisies (Leucanthemum vulgare) flowering on cliffs above Marloes Sands, Pembrokeshire Coast National Park, Wales, UK, May 2012.

Philippe Clement / The eroded chalk sea stacks Old Harry Rocks at Handfast Point on the Isle of Purbeck along the World Heritage Site Jurassic Coast in Dorset, UK, November 2012

Philippe Clement / View over the eroded white chalk cliffs and lighthouse at Beachy Head, Sussex, UK, November 2012

Philippe Clement / View over the eroded white chalk cliffs and lighthouse at Beachy Head, Sussex, UK, November 2012

Philippe Clement / View over the eroded white chalk cliffs and lighthouse at Beachy Head, Sussex, UK, November 2012

Philippe Clement / View over the eroded white chalk cliffs and lighthouse at Beachy Head, Sussex, England, UK November 2012

Sandra Bartocha / Ice along shore of the Baltic Sea under white chalk cliffs at dawn, Jasmund National Park, Rugen, Germany, February

Sandra Bartocha / White chalk cliffs and pebble beach on the coast of the Baltic Sea, Jasmund National Park, Germany, October 2011

Sandra Bartocha / White chalk cliffs and pebble beach along the coast of the Baltic Sea, Jasmund National Park, Germany, August 2011

Sandra Bartocha / White chalk cliffs and pebble beach along the coast of the Baltic Sea, Jasmund National Park, Germany, August 2011

Peter Cairns / 2020VISION / Seven Sisters chalk cliffs. South Downs, England, November 2011.

Peter Cairns / 2020VISION / Seven Sisters chalk cliffs. South Downs, England, November 2011.

Peter Cairns / 2020VISION / Seven Sisters chalk cliffs, South Downs, England.

Peter Cairns / 2020VISION / Seven Sisters chalk cliffs, South Downs, England.

Doug Wechsler / Hanging Lake and Bridal Veil Falls. Colorado, White River National Forest, USA, June.

Ross Hoddinott / The Pinnacles (rock stacks) near Old Harry Rocks. Studland, The Purbecks, Dorset, UK, April 2011.

Andrew Parkinson / Kittiwakes (Rissa tridactyla) breeding pair mating on their cliff top nest site, Farne Islands, Northumberland, UK, May.

Andrew Parkinson / Kittiwakes (Rissa tridactyla) pair greeting one another on their nest site, Saltee Islands, Republic of Ireland, UK, May.

Ernie Janes / Limestone arches, Flamborough Head, Yorkshire, UK, July

Frederique Olivier / Weddell seal (Leptonychotes weddellii) pup on ice beside mother, Antarctica, Taken on location for the BBC series, Frozen Planet.

Adrian Davies / Chalk cliff at the Seven Sisters, Sussex, England. April 2011.

Diane McAllister / Chrome Island Lighthouse, located off the southern tip of Denman Island, just off Vancouver Island. British Columbia, Canada, September

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.

Juergen Freund / Aerial view of Coastal island with white sand beaches and limestone face cliffs, Philippines, May 2009.

Peter Cairns / 2020VISION / Gannet (Morus bassanus) territorial display on rock, Bass Rock, Firth of Forth, Scotland, UK, June

Peter Lewis / The Seven Sisters chalk cliffs with a dusting of snow. Cuckmere Haven, Sussex, UK, December 2009.

Daniel Heuclin / White House ruins, first inhabited around 1200 CE by the Anasazi (Ancient Pueblos) culture. Canyon de Chelly National Monument, Arizona, USA, August 2009.

Angelo Gandolfi / The great crevice of Ha gorge, guarded by a white chapel. Island of Crete, Greece

Angelo Gandolfi / The great crevice of Ha gorge, guarded by a white chapel, Island of Crete, Greece

Angelo Gandolfi / View of the white cliffs of Bonifacio. The large boulder (right) fell from the main block 800 years ago. It's called "grain de sable" (grain of sand). Corsica island, France, February 2010

Colin Monteath / White cliffs, Tongaporutu, north New Zealand

Robert Thompson / White rocks, Portrush, North Antrim coast, County Antrim, Northern Ireland, UK

Ross Hoddinott / Old Harry Rocks, Studland, colourful sunrise, Dorset, England, UK. April 2010.

Ross Hoddinott / Old Harry Rocks, Studland, colourful sunrise, Dorset, England, UK. April 2010.

Jerry Monkman / A woman leads a climb of "Top of the Prow" rock on Cathedral Ledge. Echo Lake State Park, White Mountains, in North Conway, New Hampshire, USA. October 2009

Jerry Monkman / A woman leads a climb of "Top of the Prow" on Cathedral Ledge. Echo Lake State Park, White Mountains, in North Conway, New Hampshire, USA. October 2009

Jerry Monkman / A woman rappels from the top of Cathedral Ledge. Echo Lake State Park, White Mountains, in North Conway, New Hampshire, USA. October 2009

Jerry Monkman / A man rock climbing near the top of Cathedral Ledge. Echo Lake State Park, White Mountains, in North Conway, New Hampshire, USA. October 2009

Jerry Monkman / A man rock climbing near the top of Cathedral Ledge. Echo Lake State Park, White Mountains, in North Conway, New Hampshire, USA. October 2009

LYNN M. STONE / Domestic dog, Border Collie in tall grass on bluff overlooking Pacific Ocean, Southern California, USA

Philippe Clement / Norfolkline ferry passing the white cliffs of Dover, Kent, UK, July 2009

Philippe Clement / The white cliffs of Dover, Kent, UK

Philippe Clement / The white cliffs of Dover, Kent, UK, July 2009

Philippe Clement / Seafrance ferry passing the white cliffs of Dover, Kent, UK, July 2009

Philippe Clement / White cliffs of Dover, Kent, UK, July 2009

Bernard Castelein / Coastal landscape at low tide with white cliffs of Cap Blanc Nez, Cte d'Opale, North West France, May 2009

Bernard Castelein / Coastal landscape at low tide with white cliffs of Cap Blanc Nez, Cte d'Opale, North West France, May 2009

Konstantin Mikhailov / Rocky shore of an inlet of the White Sea, Karelia, N Russia, July 2009

Konstantin Mikhailov / Rocky shore of an inlet of the White Sea, Karelia, N Russia, July 2009

Guy Edwardes / White Nothe, Jurassic Coast World Heritage Site, near Weymouth, Dorset, England, July 2008

Jerry Monkman / The Swift River in fall as it flows through Rocky Gorge, Kancamagus Highway, White Mountain National Forest, New Hampshire, USA. October 2006

Nick Upton / Cross-channel ferry "Pride of Burgundy" arriving at Dover, passing the white cliffs. Kent, UK

Pete Oxford / Red-footed Booby (Sula sula websteri) white morph on nest, Wolf Island, Galapagos Islands, Ecuador, South America

Juan Carlos Munoz / White Hoodoos, Staircase-Escalante National Monument, Arizona, USA

Luis Quinta / Two White storks {Ciconia ciconia} courtship on nest, Cape Sardio, Costa Vicentina, Alentejo, Portugal

Luis Quinta / White stork {Ciconia ciconia} in flight over cliffs, Costa Vicentina, Alentejo, Portugal

Luis Quinta / White stork {Ciconia ciconia} pair on nest in distance on exposed rock on coast, Costa Vicentina, Alentejo, Portugal

Ian McCarthy / Gyrfalcon {Falco rusticolus} juvenile perched on rock, Ellesmere Island, Arctic, Canada

Juergen Freund / White bark of River red gum tree {Eucalyptus camaldulensis} Karijini NP, Western Australia

David Noton / Old Harry Rocks, Studland, Dorset, England, UK

Konstantin Mikhailov / White and red cliffs of Naran-Bulak (Eocene fossil mammal site) with Altan-Ula mount (dinosaur site) in the distance, Gobi desert, Mongolia

Staffan Widstrand / White Gyrfalcon {Falco rusticolus} male perched on cliff ledge, Baffin Island, Canada

Adrian Davies / Chalk cliffs showing wave cut platform. Sussex, UK

Gary Smith / Hunstanton cliffs, showing the red chalk, white, chalk and carr stone structure of the cliffs, Norfolk, UK.

Gary Smith / Hunstanton cliffs, showing the red chalk, white, chalk and carr stone structure of the cliffs, Norfolk, UK.

Gary Smith / Hunstanton cliffs at low tide showing the red chalk, white chalk and carr stone structure of the cliffs, Norfolk, UK.

Pete Oxford / White sand stone cliffs in Caatinga habitat, Bahia State, NE Brazil

Patricio Robles Gil / White-headed langurs on cliff face {Trachypithecus leucocephalus} Guangxi, China, 2002

Richard Du Toit / White fronted bee-eater at nest hole {Merops bullockoides} Chobe NP, Botswana

Christoph Becker / Chalk cliffs, Rugen Island, Germany

Onne van der Wal / White sea bird perched on a cliff in Isla Gallo, Mexico.

Barry Bland / A fishing boat cruising alongside the white cliffs that lead to The Needles, Isle of Wight, England, UK. The Needles Old Battery can be seen on top of the cliff, as can the look out post (far left), r...

Barry Bland / A fishing boat cruising alongside the white cliffs that lead to The Needles, Isle of Wight, England, UK.

Peter Lewis / White tailed sea eagle (Haliaeetus albicilla) perched on fir tree on a coastal cliff top in Norway.

Robert Thompson / Portbraddan from White Park Bay, North Antrim Coast, County Antrim, Northern Ireland, UK