David Hall / Harbor seal (Phoca vitulina) using a large,encrusted boulder as a tool to scratch itself against, Gowland Harbour, Quadra Island, British Columbia, Canada. March.

Guy Edwardes / Wave shaped chalk boulder beneath Beer Head at sunset Jurassic Coast World Heritage Site, Branscombe, Devon, England December 2006

Guy Edwardes / Grykes in limestone pavement at sunset,, Twisteleton Scar End, Yorkshire Dales National Park, Yorkshire, England, UK, May 2013.

Guy Edwardes / Seaweed covered rocks with Gaada Stack in background, Foula, Shetland, Scotland, UK. August, 2016.

Guy Edwardes / Fairy Pools with Cuillin range in background, Glen Brittle, Isle of Skye, Inner Hebrides, Scotland, UK. January 2015.

Jack Dykinga / Storm clouds at sunset over balancing eroded boulder, Texas Canyon, Little Dragoon Mountains, Chihuahuan Desert, Arizona, USA. September.

Alex Mustard / RF - High magnification photo of Secretary blenny (Acanthemblemaria maria) in boulder brain coral (Colpophyllia natans). East End, Grand Cayman, Cayman Islands, British West Indies. Caribbean Sea. (Th...

Alex Mustard / Boulder brain coral (Colpophyllia natans) photographed with a long exposure with camera rotation. Taken with circular fisheye lens. Grand Cayman, Cayman Islands. Caribbean Sea.

Jurgen Freund / Dingo (Canis lupus dingo) at Devils Marbles, Northern Territory, Australia.

Christophe Courteau / Storm at 'Pointe de Pern', Ile d'Ouessant / Ushant. Nividic lighthouse visible in distance. Finistere, Brittany, France, September 2011.

Jack Dykinga / Road winding through aspen trees (Populus tremuloides) in autumn, Dixie National Forest, Boulder Mountain, Utah. October 2013.

Bruno D'Amicis / Apennine chamois (Rupicapra pyrenaica ornata) adult male in snowy mountain habitat. Endemic to the Apennine mountains. Abruzzo, Italy, November.

Adam Burton / Mountainous interior of the island of Streymoy, one of the Faroe Islands. June 2012.

Steven David Miller / Devils Marbles, Devils Marbles Conservation Reserve, Northern Territory, Australia, June 2010

Florian Möllers / Eurasian Lynx (Lynx lynx) adult sitting on boulder covered in deep snow in beech (Fagus sylvatica forest, captive in enclosure of the Bavarian Forest National Park, Germany, February.

Alex Mustard / Boulder star coral (Montastraea annularis) spawning at night with released bundles of eggs and sperm floating away in the water column, East End, Grand Cayman, Cayman Islands, British West Indies, Car...

Floris van Breugel / Autumn colors along the shores of Pharaoh Lake in Adirondacks park, New York, USA. October

Andy Trowbridge / Moeraki Boulder / Kaihinaki, on Koekohe Beach. 60 Million year old mudstone concretions. Moeraki, Waitaki District, Otago Region, South Island, New Zealand. January, 2012. Taken with Blue-n-Gold Polar...

Nick Upton / Split level view of a Beadlet anemone (Actinia equina) attached to a boulder encrusted with Maerl (Lithothamnion glaciale) a red coralline alga, in a large rockpool, Crail, Scotland, UK, July

Ben Hall / 2020VISION / Red grouse (Lagopus lagopus scoticus) standing on gritstone boulder with flowering heather (Ericaceae sp), Peak District NP, August 2011. Did you know? While the female grouse is incubating her eggs,...

Ben Hall / Red grouse (Lagopus lagopus) perched on granite boulder, Dark Peak, Peak District NP, Derbyshire, UK, September 2010, Highly Commended, Habitat category, British Wildlife Phototgraphy Awards (BWPA) co...

Jurgen Freund / Blue sea star on massive Boulder coral (Gardineroseris planulata) North Sulawesi, Indonesia. This coral species is normally found from the Red Sea to Central America, and is relatively uncommon in the...

Jurgen Freund / Diver swimming over massive boulder / Cauliflower coral (Gardineroseris planulata) Buyat Bay, Sulawesi, Indonesia.

Jurgen Freund / Massive boulder / Cauliflower coral (Gardineroseris planulata) with blue sea star, Buyat Bay, Sulawesi, Indonesia, Indo-pacific.

Peter Cairns / 2020VISION / Rock ptarmigan (Lagopus mutus) perched on boulder, camouflaged against snow in winter plumage, Cairngorms NP, Highlands, Scotland, UK, February

Peter Cairns / 2020VISION / Rock ptarmigan (Lagopus mutus) flying from boulder field in winter plumage, Cairngorms NP, Highlands, Scotland, UK, February

Alex Mustard / An Ornate / Banded Wobbegong Shark (Orectolobus ornatus) lies amongst boulders inside a cave, during the day. Fish Rock, Southwest Rocks, New South Wales, Australia. Pacific Ocean. November

Alex Mustard / Atlantic grey seal (Halichoerus grypus) swimming beneath the surface, Lundy Island, Devon, England, UK. July 2010. Highly commended, Coast and Marine category, British Wildlife Photography Awards (BWP...

Alex Mustard / Atlantic grey seal (Halichoerus grypus) swimming beneath the surface, Lundy Island, Devon, England, UK. July 2010

Roger Powell / Red-legged Partridge (Alectoris rufa) portrait of male perched on a prominent boulder & calling over territory. Castro Verde, Portugal, April

Roger Powell / Male Common Quail (Coturnix coturnix) perched on a boulder surveying its display area Castro Verde, Portugal, April

Graham Eaton / An underwater view of a mountain stream showing internal reflections on the water surface, Snowdonia NP, Gwynedd, Wales, UK, December 2009.

Alan Watson / Moss-covered Oak trees (Quercus petraea) and boulders, Tomies Wood, Killarney National Park, County Kerry, Republic of Ireland, Europe

Steven Kazlowski / Petroglyphs on Newspaper Rock, a boulder in Canyonlands National Park, Utah, USA. 2009.

Alex Hyde / Derwent Edge after rainstorm, with gritstone boulders in foreground. Peak District National Park, England. March 2008.

Wild Wonders of Europe / Widstra / White storks (Ciconia ciconia) at nest, on large granite boulder, Los Barruecos Natural Monument, Caceres, Extremadura, Spain, April 2009 WWE OUTDOOR EXHIBITION.

Jouan & Rius / Granite boulder of Devils Marbles, Karlu Karlu Conservation Reserve, Northern Territory, Australia

Carol Walker / Yellow Labrador Retreiver (Canis familiaris) running in snow. Boulder, Colorado.

Ross Hoddinott / Porth Nanven, nr St Just, Cornwall, UK - important example of quaternary geopmorphology: a raised Boulder beach, overlain by a considerable thickness of 'Head' deposits which demonstrates changes of s...

Jack Dykinga / Boulder with zig-zag trails across a dry lake bed, sunset, Ubehebe Peak in distance, The Racetrack Playa, Death Valley National Park, California

Jack Dykinga / Hoodoo rock pillar and boulder eroded by the weather, Boulder Mountain, Aquarius plateau, Utah, USA

Jack Dykinga / High angle shot of trunks of Quaking aspen trees {Populus tremuloides} in autumn, Boulder Mountain, Dixie national forest, Utah, USA

Jack Dykinga / Quaking aspen trees {Populus tremuloides} in autumn, Boulder Mountain, Dixie national forest, Utah, USA

Jack Dykinga / Trunks of Quaking aspen trees {Populus tremuloides} in morning sun, autumn, Boulder Mountain, Dixie national forest, Utah, USA

Gavin Hellier / Granite Boulder at Anse Source d'Argent beach, La Digue Island, Seychelles, Indian Ocean

Martin Gabriel / Granite boulder, Pontok Mountainss, Spitzkoppe, Namibia

Tim Fitzharris / Deciduous forest in fall, Ozark-Saint Francis National Forest, Arkansas

Tim Fitzharris / Deciduous forest in fall, Ozark-Saint Francis National Forest, Arkansas