Kuchie nomad camel train, between Chakhcharan and Jam, Afghanistan, Asia

Kuchie nomad camel train, between Chakhcharan and Jam, Afghanistan, Asia

Valley of the Moon, Atacama Desert, Chile

Party of trekkers on top of dunes at Chigaga, Draa Valley, Morocco, North Africa

Camel at the Khongryn dunes, Gobi desert, Gobi National Park, Omnogov Province, Mongolia, Central Asia, Asia

Dawn ridges, near Namib Naukluft Park, Namibia, Africa

Sand dunes, Grand Erg Occidental, Sahara Desert, Algeria, Africa

Outback shack, New South Wales, Australia

Close-up of sand dunes in Erg Chebbi sand sea, Sahara Desert, near Merzouga, Morocco, North Africa, Africa

Bedouins, Sinai, Egypt, North Africa

Hot air balloon floating over the Temple of Hatshepsut, Valley of the Kings, Luxor, West Bank, Egypt

Painted rocks, Tafraoute, Morocco, North AfricaIn 1984 Belgian artist Jean Verame used 18 tonnes of paint and the help of a group of Moroccan firemen to paint the granite boulders in the anti-Atlas country west of Tafraoute

Camel train through desert, Morocco, North Africa

Young berber boy, Dades Valley, Morocco, North Africa

Tea ceremony, Tafilalt, Morocco, North Africa

Camel caravan, Khongoryn Els dune, Gobi Desert National Park, Omnogov, Mongolia

Camel caravan, Omnogov, Gobi Desert, Khongoryn Els Dunes, Mongolia

Camel, Gobi Desert National Park, Khongoryn Els Dunes, Omnogov, Mongolia, Asia

Cactus at sunset, La Paz, Mexican desert, Baja California, Mexico

Footsteps, desert scenery, Wadi Rum, Jordan, Middle East

Sand dunes, Maspalomas, Gran Canaria, Canary Islands, Spain, Europe

Sandy dunes, Maspalomes, Gran Canaria, Canary Islands, Spain

Arid landscape, Wadi Rum, Jordan, Middle East

Ancient city ramparts, archaeological site of Babylon, Iraq, Middle East

Ship's graveyard near Aralsk, on seabed due to water losses, Aral Sea, Kazakhstan, Central Asia

Camel trek in Sahara dunes near Merzouga, Morocco, North Africa

Dunes of the Erg Chebbi, Sahara Desert near Merzouga, Morocco, North Africa

Sahara Desert with lone figure in foreground, Amguid, Algeria, Africa

Sahara Desert, Hoggar Mountains, sunrise over Assekrem, Algeria, North Africa

Pinnacle Desert, Western Australia

Chiquicamata Coppermine, Atacama Desert, Chile, South America

Bajrawiya, the Pyramids of Meroe, Sudan, Africa

Panoramic view of trees and mountains in desert landscape, Namib Rand game reserve, Namib Naukluft Park, Namibia, Africa

Sand dunes of the Erg Chebbi, Sahara Desert near Merzouga, Morocco, North Africa, Africa

Sand dunes of the Erg Chebbi, Sahara Desert near Merzouga, Morocco, North Africa, Africa

Palm trees and cultivation in volcanic soil, Lanzarote, Canary Islands, Spain

Camels, Central Desert, Northern Territory, Australia

Silhouette of palm trees and desert island at sunrise, Rarotonga, Cook Islands, South Pacific

Saguaro organ pipe cactus and prickly pear cactus, Saguaro National Monument, Tucson, Arizona, USA, North America

Jabal Rum, desert landscape in Southern Jordan, Wadi Rum, Jordan, Middle East

1st century AD Nabatean Corinthian Tomb, Wadi Musa, Petra, Jordan, Middle East

View over Graeco-Roman city towards Roman Temple of Bel, 45 AD, Palmyra, Syria, Middle East

Irrigated winter wheat, oasis in Gobi Desert, Gansu Province, China, Asia

Pyramid of Menkewre (left), pyramid of Chephren (centre), pyramid of Cheops (right), Giza, Egypt, North Africa, Africa

Sahara Desert, Algeria, North Africa, Africa

The Pyramids, Giza, UNESCO World Heritage Site, near Cairo, Egypt, North Africa, Africa

San Pedro de Atacama, Atacama Desert, Chile, South America

Atacama Desert, Chile, South America

Tuareg and wife leading camel train through the desert near Djanet, Algeria, North Africa

Panoramic view over orange sand dunes towards mountains, Namib Rand private game reserve, Namibia, Africa

Panoramic view of dead trees and orange sand dunes, Dead Vlei, Namib Desert, Namibia, Africa

Panoramic view of dead trees and orange sand dunes, Dead Vlei, Namib Desert, Namibia, Africa

Dune and tree, Namib Naukluft Park, Namib Desert, Namibia, Africa

Panoramic view of mountains and dune glowing in last light before sunset, Namib Rand, Namib Naukluft Park, Namibia, Africa

Panoramic view over dunes, Sossusvlei, Namib Naukluft Park, Namib Desert, Namibia, Africa

Panoramic view of rock arch, Spitzkoppe, Namibia, Africa

Dunes of the Erg Chebbi, Sahara Desert near Merzouga, Morocco, North Africa, Africa

Sand dunes and sea beyond, Maspalomas, Gran Canaria, Canary Islands, Spain, Europe

Akakus, Sahara Desert, Fezzan, Libya, North Africa, Africa

Desert-dwelling Elephant, (Loxodonta africana), Dry River, Hoanib, Kaokoland, Namibia

Flap-necked Chameleon, (Chamaeleo dilepsis), Etoscha National Park, Namibia

Camel guide and camels, rolling sand dunes of the Erg Chebbi dune sea, Sahara Desert, near Merzouga, Morocco, North Africa, Africa

Nubian man in desert, near St. Simeon's monastery, Aswan, Egypt, North Africa, Africa

Southwest Harbor, Mount Desert Island, Maine, New England, United States of America, North America

Old Muscat and Sultan Qaboos Palace, Muscat, Oman, Middle East

Porters, Mui Ne, Vietnam, Indochina, Southeast Asia, Asia

Porters, Mui Ne, Vietnam, Indochina, Southeast Asia, Asia

Landscape and century plant, Baja, Mexico, North America

Devils Racetrack, Death Valley National Park, California, United States of America, North America

Valle de la Luna (Valley of the Moon), Atacama Desert, El Norte Grande, Chile, South America

Ruins of church, Abo, Salinas Pueblo Missions National Monument, Salinas Valley, New Mexico, United States of America, North America

Church ruins, Abo,Salinas Pueblo Missions National Monument, Salinas Valley, New Mexico, United States of America, North America

Church ruins, Gran Quivira, Salinas Pueblo Missions National Monument, Salinas Valley, New Mexico, United States of America, North America

Church ruins, Gran Quivira, Salinas Pueblo Missions National Monument, Salinas Valley, New Mexico, United States of America, North America

Gran Quivira, Kiva Ruins, Salinas Pueblo Missions National Monument, Salinas Valley, New Mexico, United States of America, North America

Church, Quarai, Salinas Pueblo Missions National Monument, Salinas Valley, New Mexico, United States of America, North America

Ancient Sahira Dam at the Pre-Aksumite settlement of Qohaito, Eritrea, Africa

Camel caravan along the road from Asmara to Qohaito, Eritrea, Africa

Old coaches of the Italian railway from Massawa to Asmara, Eritrea, Africa

Young kids riding on donkeys to a water hole in the lowland of Eritrea, Africa

Old coaches of the Italian railway from Massawa to Asmara, Eritrea, Africa

Tourist climbing dunes, Valle de la Luna (Valley of the Moon) (Moon Valley), Atacama Desert, Chile, South America

Camel, Erg Chebbi, Merzouga, Sahara Desert, Morocco, North Africa, Africa

Camels, Erg Chebbi, Merzouga, Sahara Desert, Morocco, North Africa, Africa

Berber man standing with his camel, Erg Chebbi, Sahara Desert, Merzouga, Morocco, North Africa, Africa

Man in traditional dress in the desert outside Dubai, United Arab Emirates, Middle East

Bedouin on camel in the desert, Wadi Rum, Jordan, Middle East

Al Deir (Ed Deir) (The Monastery), Petra, UNESCO World Heritage Site, Jordan, Middle East

Desert Bighorn Sheep (Ovis canadensis nelsoni) ram, Valley of Fire State Park, Nevada, United States of America, North America

Desert Bighorn Sheep (Ovis canadensis nelsoni) ram, Valley of Fire State Park, Nevada, United States of America, North America

Desert Bighorn Sheep (Ovis canadensis nelsoni) ram, Valley of Fire State Park, Nevada, United States of America, North America

Desert Bighorn Sheep (Ovis canadensis nelsoni) ewe and two lambs, Valley of Fire State Park, Nevada, United States of America, North America

Desert Bighorn Sheep (Ovis canadensis nelsoni) ram, Valley of Fire State Park, Nevada, United States of America, North America

Sand dune blocks road in the Qatari desert, Qatar, Middle East

Sand dunes and electricity pylons dominate the desert landscape, Qatar, Middle East

Electricity pylons dominate the flat barren landscape, pointing to civilisation somewhere, Qatar, Middle East

Settlements in the Qatari desert, nomadic culture still evident in the desert, Qatar, Middle East

Crude Oil Line in the Qatari desert, Qatar, Middle East

Walls of mosaic fretwork and geometric designs, Mitla Archaeological Site, San Pablo de Mitla, Oaxaca, Mexico, North America

Berber camel leader with three camels in Erg Chebbi sand dunes, Sahara Desert, near Merzouga, Morocco, North Africa, Africa