David Tipling / Gentoo Penguins (Pygoscelis papua) about to enter the sea, Brown Bluff Antarctic Peninsula, Antarctica, November

Troels Jacobsen/Arcticphoto / Adelie Penguins (Pygoscelis adeliae) diving into the water, on their way out to sea to feed. Brown Bluff. Antarctic Peninsula.

Nick Garbutt / Wild female Jaguar (Panthera onca palustris) jumping up sandy bluff on the banks of the Piquiri River (a tributary of Cuiaba River). Northern Pantanal, Brazil. September

Rob Brown / Sunset on beach, Kahurangi National Park, New Zealand

David Tipling / Gentoo penguin (Pygoscelis papua) flapping wings on rock, Brown Bluff, Antarctica

Will Watson / Welsh Pony {Equus caballus} Hay Bluff, Black Mountains National Park, Powys, Wales, UK, winter

David Tipling / Adelie Penguin (Pygoscelis adeliae) incubating on nest in snow, Brown Bluff, Antarctic Peninsula, November

David Tipling / Adelie Penguin (Pygoscelis adeliae) colony at Brown Bluff, Antarctic Peninsula, November

Kirkendall-Spring / Yaquina Head Lighthouse perched on a bluff above the Pacific Ocean in Yaquina Head Outstanding Natural Area near Newport, Oregon, USA, June 2012

Kirkendall-Spring / Cape Blanco Light on a bluff above the Pacific Ocean in Cape Blanco State Park, Oregon, USA, June 2012

Kirkendall-Spring / Cape Blanco Light on a bluff above the Pacific Ocean in Cape Blanco State Park, Oregon, USA, June 2012

Hiroya Minakuchi / Adelie Penguin (Pygoscelis adeliae) nesting colony, Brown Bluff, Antarctic Peninsula, Antarctica

Sue Flood / Adelie penguins (Pygoscelis adeliae) young individuals go to sea at Brown Bluff, Antarctic Peninsula. January

Rick Tomlinson / SY "Adele", 180 foot Hoek Design, motoring in Graham Passage, Bluff Island, January 2007 Non editorial uses must be cleared individually.

Colin Monteath / Kelp Goose (Chloephaga hybrida) female, Bluff Cove, Falkland Islands

Colin Monteath / Domestic Sheep (Ovis aries) pair grazing beside Upland Goose (Chloephaga picta) group, Bluff Cove, Falkland Islands

Bryan and Cherry Alexander / Tourists walking amongst ice blocks in the surf on Brown Bluff Beach, Southern Ocean, Antarctica, October 2006.

Bryan and Cherry Alexander / Pillow Lava draped by slumped hyaloclastite, on the shore at Brown Bluff, Antarctica, October 2009.

Bryan and Cherry Alexander / Lava crumbs encased in hyaloclastite material from Brown Bluff, Antarctica, October 2006.

Bryan and Cherry Alexander / Tourists looking at weathered volcanic rocks on the beach at Brown Bluff. Tabarin Peninsula, Antarctica, October 2006.

Bryan and Cherry Alexander / Weathered volcanic rocks stand on the beach at Brown Bluff. Tabarin Peninsula, Antarctica, October 2009.

Charlie Summers / Blue Wildebeest (Connochaetes taurinus) and Gemsbok (Oryx gazella) face off in dominance bluff. The Kgalagadi Transfrontier Park, South Africa, September.

Troels Jacobsen/Arcticphoto / Adelie Penguins (Pygoscelis adeliae) porpoising whilst swimming. This enables them to breathe. Brown Bluff, Antarctica, May.

Troels Jacobsen/Arcticphoto / Adelie Penguins (Pygoscelis adeliae) walking along ice-shelf above thawed ice in a rough sea. Brown Bluff, Antarctic Peninsula.

Jerry Monkman / After sunset as seen from a bluff overlooking the Merrimack River in Canterbury, New Hampshire, USA. December 2009

Jerry Monkman / View from a bluff overlooking the Merrimack River, after snowfall. Canterbury, New Hampshire, USA. December 2009

Jouan & Rius / View of waves hitting red bluff coastal cliffs, Kalbarri National Park, Western Australia. August 2009

Tim Laman / Snowy, foggy morning at Brown Bluff, Antarctica, January 2009

LYNN M. STONE / Hungarian Vizsla dog standing in ice plant on bluff overlooking Pacific Ocean, Southern California, USA

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

Yva Momatiuk & John Eastcott / Eroded sandstone bluffs, Henry Mountains, Utah

Yva Momatiuk & John Eastcott / Eroded sandstone bluffs, Henry Mountains, Utah

Yva Momatiuk & John Eastcott / Moon over eroded sandstone bluffs, Henry Mountains, Utah

Jan Vermeer / Pintado Petrel (Daption capense) flock flying, Brown Bluff, Antarctica

Jan Vermeer / Adelie Penguin (Pygoscelis adeliae) tobogganing over snow, Brown Bluff, Antarctica

Jan Vermeer / Pintado Petrel (Daption capense) landing on the water, Brown Bluff, Antarctica

Jan Vermeer / Pintado Petrel (Daption capense) landing on the water, Brown Bluff, Antarctica

Nick Groves / Kohaihai Bluff from Boulder Beach to the north, Heaphy Track, Kahurangi National Park, New Zealand

Will Watson / Welsh Ponies {Equus caballus} on Hay Bluff, Black Mountains, Brecon Beacons National Park, Wales, UK

Will Watson / Welsh Ponies {Equus caballus} on Hay Bluff, Black Mountains, Brecon Beacons National Park, Wales, UK

Will Watson / Welsh Ponies {Equus caballus} on Hay Bluff, Black Mountains, Brecon Beacons National Park, Wales, UK

Tim Fitzharris / Blue Ridge Mountains from Bluff Mountain Overlook, North Carolina

Thomas Mangelsen / Adelie Penguin (Pygoscelis adeliae) and Gentoo Penguins (Pygoscelis papua) playing on an iceberg washed ashore, Brown Bluff, Antarctica Peninsula, Antarctica

Thomas Mangelsen / Adelie Penguin (Pygoscelis adeliae) parent cares for chick on rock nest, Brown Bluff, Antarctica Peninsula, Antarctica

Steven David Miller / View from Bulimba Bluff across Consuelo Tableland, Carnarvon Gorge NP, Queensland, Australia

Doug Perrine / The Bluff, Cayman Brac, Cayman Islands, Caribbean

Adrian Davies / Elephant hawk moth larva showing false eye threat/bluff display. Southern England.

Colin Monteath / Tourist photographing icebergs and bergy bits on Brown Bluff Beach near Hope Bay, Antarctic Sound, Antarctica

Colin Monteath / Adelie Penguin (Pygoscelis adeliae) group coming ashore to rookery, Brown Bluff, Antarctic Peninsula, Antarctica

Michael & Patricia Fogden / Christmas Tree (Nuytsia floribunda) and Bluff Knoll, Stirling Range National Park, Western Australia

Hiroya Minakuchi / Adelie Penguin (Pygoscelis adeliae) group walking to sea, Brown Bluff, Antarctic Peninsula, Antarctica

Yva Momatiuk & John Eastcott / Bright cumulus clouds above arid desert and sandstone bluffs at sunrise, Capitol Reef National Park, Utah

Yva Momatiuk & John Eastcott / Eroded sandstone bluffs, Henry Mountains, Utah

Yva Momatiuk & John Eastcott / Eroded sandstone bluffs, Henry Mountains, Utah

Jan Vermeer / Adelie Penguin (Pygoscelis adeliae) colony, Brown Bluff, Antarctica

Jan Vermeer / Adelie Penguin (Pygoscelis adeliae) colony, Brown Bluff, Antarctica

Jan Vermeer / Pintado Petrel (Daption capense) pair flying, Brown Bluff, Antarctica

Jan Vermeer / Adelie Penguin (Pygoscelis adeliae) colony, Brown Bluff, Antarctica

Jan Vermeer / Pintado Petrel (Daption capense) flying, Brown Bluff, Antarctica

Colin Monteath / Adelie Penguin (Pygoscelis adeliae) group walking amid bergy bits on Brown Bluff beach near Hope Bay, Antarctic Sound, Antarctica

Gerry Ellis / Adelie Penguin (Pygoscelis adeliae) leaping into ocean from ice edge, Antarctica Peninsula, Antarctica