Gavin Hellier / Mansudae Grand Monument- people in front of giant statues of former Presidents Kim Il-Sung and Kim Jong Il, Mansudae Assembly Hall on Mansu Hill, Pyongyang, Democratic Peoples' Republic of Korea (DPRK...

Floris van Breugel / Natural iridescent oil film from decaying leaves at the surface of a pool, with a cottonwood leaf floating. Escalante National Monument, Utah. November.

Jack Dykinga / Sunset Crater National Monument with dawn light on the San Francisco Peaks over fields of flowering Prairie sunflowers (Helianthus petiolaris) Arizona

Jack Dykinga / Sunflower flower (Helianthus petiolaris) at Sunset Crater National Monument, Arizona

Merryn Thomas / Dugald Stewart Monument, Calton Hill, with the city of Edinburgh beyond. Scotland, September 2011.

Daniel Heuclin / Great basin Gopher Snake / Bullsnake (Pituophis catenifer deserticola) head profile, controlled conditions, Joshua Tree National Monument, California USA

Nick Turner / Stonehenge at night, Wiltshire, England, UK, September 2009.

Nick Turner / Close up of Stonehenge stones at night, Wiltshire, England, Uk, September 2009.

Nick Turner / Close up of Stonehenge stones at night, Wiltshire, England, UK, September 2009.

Peter Lewis / Corfe Castle rising out of mist, viewed from Kingstone, Purbeck, Dorset, UK, September 2010

Florian Möllers / House sparrow (Passer domesticus) breeding in the cannon tube of a tank at the Russian War Monument, Unter den Linden, Berlin, Germany, June 2007

Floris van Breugel / Warm sunlight after a snowstorm reveals intricate patterns in the 'Painted Hills' caused by slowly eroding rich fossil beds, in the John Day Fossil Beds National Monument, Oregon, USA. December 2009

Floris van Breugel / A colorful explosion of rocks embedded in three feet of permanent cave ice deep in a lava tube cave (illuminated with a flashlight in the utter darkness.) Lava Beds National Monument, Northern Califor...

Floris van Breugel / Aerial view of spring wildflower displays, Phacelia (purple) San Joaquin Blazing Star (orange) and Coreopsis (yellow) Temblor Range, Carrizo Plain National Monument in California, USA, April 2010

Floris van Breugel / Aerial view of spring wildflower displays, Phacelia (purple) San Joaquin Blazing Star (orange) and Coreopsis (yellow) Temblor Range, Carrizo Plain National Monument in California, USA, April 2010

Jack Dykinga / Fallen leaves of Boxelder {Acer Negundo} and Cottonwood {Populus fremontii) floating on pool in autumn with reflections of canyon walls, Lower Calf Creek Falls, Grand Staircase - Escalante National Mo...

Jack Dykinga / Striated sandstone patterns in petrified sand dunes caused by erosion, Vermilion Cliffs National Monument, Colorado Plateau, Arizona, USA

Jack Dykinga / Prairie sunflowers (Helianthus petiolaris) catching the sunlight on a sand dune in deep morning shadow. Great Sand Dunes National Monument, Colorado, USA

Jack Dykinga / Fallen leaves of Boxelder {Acer Negundo} and Cottonwood {Populus fremontii) floating on pool in autumn, Lower Calf Creek Falls, Grand Staircase - Escalante National Monument, Utah

Jack Dykinga / Fallen leaves of Boxelder {Acer Negundo} and Cottonwood {Populus fremontii) floating on pool in autumn, Lower Calf Creek Falls, Grand Staircase - Escalante National Monument, Utah

Jack Dykinga / Striated sandstone eroded in circular pattern, dawn, Vermilion Cliffs National Monument, Arizona, USA

Jack Dykinga / Eroded striated sandstone (petrified sand dunes), Vermilion Cliffs National Monumant, Colorado Plateau, Arizona, USA

Jack Dykinga / Paria Canyon's walls with mud patterns indicating former river channel, Navajo sandstone, Vermilion Cliffs National Monument, Arizona, USA

Jack Dykinga / Lower Calf Creek Falls with Boxelders {Acer Negundo} and Cottonwoods {Populus fremontii) in the foreground, autumn colours, Grand Staircase - Escalante National Monument, Utah

Jack Dykinga / Silhouette of Devils Garden with windows showing between eroded sandstone pinnacles, Grand Staircase - Escalante National Monument, Utah, USA

Jack Dykinga / Saguaro cactus (Carnegiea gigantea) twisted by exposure to frost, Maricopa Mountains Wilderness, Sonoran Desert National Monument, Arizona, USA

Jack Dykinga / Eroded striated sandstone with round concretions strewn in geometric patterns, dawn, Vermilion Cliffs National Monument, Colorado Plateau, Arizona, USA

Jack Dykinga / Saguaro cacti (Carnegiea gigantea) silhouetted at sunrise, Sand Tank Mountains, Sonoran Desert National Monument, Arizona, USA

Rob Tilley / White sand dunes against blue sky, White Sands National Park, New Mexico, USA, February 2009

Rob Tilley / White sand dunes against blue sky, White Sands National Park, New Mexico, USA, February 2009

Rob Tilley / White sand dunes against blue sky, White Sands National Park, New Mexico, USA, February 2009

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.

Jack Dykinga / A river flowing through a rock arch formed by giant Navajo Sandstone rockslide in the Vermilion Cliffs National Monument, Arizona

Jack Dykinga / Close-up of the twisted limbs of a freeze-damaged Saguaro Cactus (Carnegiea gigantea), with new limbs emerging. Sonoran Desert National Monument, Arizona

Jeff Vanuga / Toadstool Hoodoo in the Grandstaircase-Escalante National Monument, Utah, USA

Pete Oxford / Devil's Tower National Monument, Wyoming

Pete Oxford / Black-tailed Prairie Dog (Cynomys ludovicianus) looking for danger, Devil's Tower National Monument, Wyoming

Pete Oxford / Devils Tower National Monument, East Wyoming, USA. Rises 1267 feet above surrounding plains, formed by solidification of a molten magma plug.

Jack Dykinga / Ocotillos (Fouquieria splendens) amongst flowering Mexican Poppies (Eschscholtzia mexicana) on east facing slopes, Sonoran Desert National Monument, Arizona, USA

Jack Dykinga / Saguaro Cacti (Carnegiea gigantea) in a summer storm at sunset, with a rainbow in the background, Maricopa Mountains, Sonoran Desert National Monument, Arizona, USA

Jack Dykinga / Sunset at Javalina Mountain and the Sand Tank Mountains, Sonoran Desert National Monument, Arizona, USA

Jack Dykinga / Saguaro Cacti (Carnegiea gigantea) at sunrise, Sonoran Desert National Monument, Arizona, USA

Jack Dykinga / Signal Hill petroglyphs at sunset with Saguaro Cacti (Carnegiea gigantea) and Tucson Mountains in the background, Saguaro National Monument, Arizona, USA

Jack Dykinga / Organ Pipe Cactus (Stenocereus thurberi) amongst flowering Brittlebush (Encelia farinosa) and Teddy Bear Cholla (Opuntia bigelovii), with the Ajo Mountains in the background Organ Pipe Cactus National...

Jack Dykinga / Teddy Bear Cholla (Opuntia bigelovii) and Saguaro Cacti (Carnegiea gigantea) lit by the afternoon light in the Sand Tank Mountains, Sonoran Desert National Monument, Arizona, USA

Philippe Clement / Saguaro cactus {Carnegiea gigantea}, Organ Pipe Cactus National Monument, Arizona, USA

Philippe Clement / Saguaro cactus {Carnegiea gigantea} showing fruit, Organ Pipe Cactus National Monument, Arizona, USA May 2007

Jack Dykinga / Cockscomb, cap rock hoodoos of Carmel sandstone, Grand Staircase - Escalante National Monument, Utah, USA

Jack Dykinga / Looking down into the leaves of an Agave plant {Agave utahensis} with Pinyon pine cone {Pinus edulis}, Grand Canyon-Parashant National Monument, Arizona, USA

Jack Dykinga / Cockscomb, cap rock hoodoos of Carmel sandstone, Grand Staircase - Escalante National Monument, Utah, USA

Jack Dykinga / Red algae on seeps along stream, Death Hollow, Grand Staircase-Escalante National Monument, Utah, USA

Michael Durham / Western Pipistrelle (Pipistrellus hesperus) bat flying over desert scrub, near Pine Creek in the John Day Fossil Beds National Monument, Clarno Unit, Oregon, this is the smallest bat found north of Me...

Michael Durham / Western Pipistrelle (Pipistrellus hesperus) bat chases a moth over desert scrub, near Pine Creek in the John Day Fossil Beds National Monument, Clarno Unit, Oregon

Tim Fitzharris / The Mittens and Merrick Butte at sunrise, Monument Valley, Arizona

Tim Fitzharris / East and West Mittens, buttes with rippled sand, Monument Valley, Arizona

Tim Fitzharris / Sunset Arch, Grand Staircase-Escalante National Monument, Utah

Tim Fitzharris / Cloud over White Sands National Park, Chihuahuan Desert, New Mexico

Tim Fitzharris / 750 foot tall sand dunes, tallest in North America, Great Sand Dunes National Monument, Colorado

Tim Fitzharris / View from Grandview Point looking over sandstone canyons of Monument Basin in the Island in the Sky section of the park, Canyonlands National Park, Utah

Gavin Hellier / The 'Mittens' at sunset Monument Valley Navajo Tribal Park, Arizona, USA

Yva Momatiuk & John Eastcott / Lone hiker walking along the base of a sandstone butte strong pattern of wavy lines in petrified sand dunes are exposed by erosion, Vermilion Cliffs National Monument, Colorado Plateau, Utah

Yva Momatiuk & John Eastcott / Lone hiker walking along the base of a sandstone butte strong pattern of wavy lines in petrified sand dunes are exposed by erosion, Vermilion Cliffs National Monument, Colorado Plateau, Utah

Yva Momatiuk & John Eastcott / Lone hiker walking on colorful sandstone strong pattern of wavy lines in petrified sand dunes are exposed by erosion, Vermilion Cliffs National Monument, Colorado Plateau, Utah

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

Yva Momatiuk & John Eastcott / Colorful sandstone patterns of lines, ridges and ripples, carved by erosion, are reflected in rainwater pool, Vermilion Cliffs National Monument, Colorado Plateau, Utah

Yva Momatiuk & John Eastcott / Toadstool Caprocks created by erosion, near Paria River, Grand Staircase-Escalante National Monument, Utah

Yva Momatiuk & John Eastcott / Petrified wood log with intricate patterns and colors, Petrified Forest National Park, Arizona

Yva Momatiuk & John Eastcott / Organ Pipe Cactus (Stenocereus thurberi) with many stalks, spring evening, during drought year, Organ Pipe Cactus National Monument, Arizona

Yva Momatiuk & John Eastcott / Gila Woodpecker (Melanerpes uropygialis) nesting in Saguaro (Carnegiea gigantea) in desert, spring, Sonoran Desert National Monument, Arizona

Yva Momatiuk & John Eastcott / Cirrus and cumulus clouds over mesa, Monument Valley Navajo Tribal Park, Arizona

Yva Momatiuk & John Eastcott / Black-tailed Prairie Dog (Cynomys ludovicianus) eating grass in summer, Devil's Tower National Park, Wyoming

Tim Fitzharris / Sand dunes and the Mittens, Monument Valley Navajo Tribal Park, Arizona

Jim Brandenburg / Mexican Golden Poppy (Eschscholzia glyptosperma) field with Saguaro (Carnegiea gigantea) cactus, Organ Pipe Cactus National Monument, Arizona

Jim Brandenburg / Mexican Golden Poppy (Eschscholzia glyptosperma) field with Saguaro (Carnegiea gigantea) cactus, Organ Pipe Cactus National Monument, Arizona

Jim Brandenburg / Desert Spiny Lizard (Sceloporus magister) sunning on rock, Monument Valley National Monument, Arizona

Jim Brandenburg / Mexican Golden Poppy (Eschscholzia glyptosperma) field, Organ Pipe Cactus National Monument, Arizona

Tim Fitzharris / Kitt Peak under moon from Saguaro National Monument, Arizona.

Jim Brandenburg / Purple rock is catlinite or pipestone used by Native Americans to make the peace pipe, Pipestone Creek, Pipestone National Monument, Minnesota

Georgette Douwma / Mexican hat, Monument valley, Arizona, USA sandstone erosion

Gavin Hellier / Siegessaule monument, also know as the Victory Column the monument was constructed to commemorate the German victories over Denmark in 1864, Austria is 1866 and France in both 1870 and 1871, Berlin, G...

Gavin Hellier / Schiller Monument and Concert Hall, Gendarmenmarkt, Berlin, Germany, 2010

Gavin Hellier / Mansudae Grand Monument depicting the 'Anti Japanese Revolutionary Struggle' and 'Socialist Revolution and Construction' Mansudae Assembly Hall on Mansu Hill, Pyongyang, Democratic Peoples' Republic o...

Gavin Hellier / Mansudae Grand Monument people bowing to giant statues of former Presidents Kim Il-Sung and Kim Jong Il, Mansudae Assembly Hall on Mansu Hill, Pyongyang, Democratic Peoples' Republic of Korea (DPRK) N...

Gavin Hellier / Mansudae Grand Monument, statues of former Presidents Kim Il-Sung and Kim Jong Il, Mansudae Assembly Hall on Mansu Hill, Pyongyang, Democratic Peoples' Republic of Korea (DPRK) North Korea, 2012

Gavin Hellier / Mansudae Grand Monument - people bowing to giant statues of former Presidents Kim Il-Sung and Kim Jong Il, Mansudae Assembly Hall on Mansu Hill, Pyongyang, Democratic Peoples' Republic of Korea (DPRK)...

Gavin Hellier / Mansudae Grand Monument, giant statues of former Presidents Kim Il-Sung and Kim Jong Il, Mansudae Assembly Hall on Mansu Hill, Pyongyang, Democratic Peoples' Republic of Korea (DPRK) North Korea, 2012

Gavin Hellier / Mansudae Grand Monument, giatn statues of former Presidents Kim Il-Sung and Kim Jong Il, Mansudae Assembly Hall on Mansu Hill, Pyongyang, Democratic Peoples' Republic of Korea (DPRK) North Korea, 2012

Gavin Hellier / Mansudae Grand Monument, giant statues of former Presidents Kim Il-Sung and Kim Jong Il, Mansudae Assembly Hall on Mansu Hill, Pyongyang, Democratic Peoples' Republic of Korea (DPRK) North Korea, 2012

Gavin Hellier / Flower show and idealised painting to celebrate Kim Il Sung's 100th Anniversary, Kimilsungia Flower Exhibition Hall, Pyongyang, North Korea, Democratic Peoples' Republic of Korea (DPRK) 15 April 2012

Gavin Hellier / Bow and Arrow Sculpture in Rincon Park, Embarcadero, San Francisco, California, USA, June 2011

Gavin Hellier / Bridge crossing the Taedong river, Juche Tower (symbol of the Juche Idea, penned by Kim Il Sung) Pyongyang, North Korea, Democratic Peoples' Republic of Korea (DPRK) April 2012

Jeff Vanuga / Toadstool Hoodoos and eroded sandstone landscape. Grandstaircase-Escalante National Monument, Utah, USA

Ann & Steve Toon / Memorial to 1989 burning of ten tonnes of ivory, by Kenyan president Daniel arap Moi, Nairobi National Park, Kenya, October 2012

Ann & Steve Toon / Memorial to 1989 burning of ten tonnes of ivory, by Kenyan president Daniel arap Moi, Nairobi National Park, Kenya, October 2012

Sue Flood / Tu Duc Royal Tomb, Hue, Vietnam

Sue Flood / Tu Duc Royal Tomb, Hue, Vietnam