The ruins of Berber troglodyte structures, Tataouine region, southern Tunisia

Alignments of Megalithic standing stones, Carnac, Morbihan, Brittany, France, Europe

Looking west in the ancient Zapotec city of Monte Alban, near Oaxaca City, Oaxaca, Mexico, North America

Jinshanling section of the Great Wall of China, UNESCO World Heritage Site, near Beijing, China, Asia

People on the Badaling section, the Great Wall of China, UNESCO World Heritage Site, near Beijing, China, Asia

Taula de Torre Trencada, prehistoric, neolithic remains of Talayotic culture, Menorca (Minorca), Balearic Islands, Spain, Mediterranean, Europe

Petroglyph of tuna fish, Ahu Tongariki, Easter Island, Chile, Pacific

Moai, Easter Island (Rapa Nui), Chile, South America

The beginning of the Great Wall, UNESCO World Heritage Site, Jiayuguan, Gansu, China, Asia

Mosque in the ruins of Berber troglodyte structures, Tataouine region, southern Tunisia

Moais, Cantera Rano Raraku, Easter Island (Rapa Nui), Chile, South America

Landscape of ancient temples and pagodas, Bagan (Pagan), Myanmar (Burma)

Shwesandaw Paya (Shwe Sandaw Pagoda) and ancient temples, Bagan (Pagan), Myanmar (Burma)

Pisac, Hitching Post of the Sun, Inca site in the Urubamba Valley, Peru, South America

Ahu Tahai, Easter Island (Rapa Nui), Chile, South America

Ancient bridge near Newport, County Mayo, Connacht, Republic of Ireland (Eire), Europe

Standing stones, Carnac, Brittany, France, Europe

Temples in the ancient pre Angkor capital of Chenla, Cambodia, Indochina, Southeast Asia, Asia

The Roman Forum and Colosseum, UNESCO World Heritage Site, Rome, Lazio, Italy, Europe

Ajanta Cave complex, Buddhist Temples carved into solid rock dating from the 5th Century BC, Ajanta, Maharastra, India

Mayan archaeological site, Tulum, Yucatan, Mexico, Central America

Ajanta Cave complex, Buddhist Temples carved into solid rock dating from the 5th Century BC, Ajanta, Maharastra, India

Roman Aqueduct at Phaselis, ancient ruins on the Mediterranean, Turkey, Eurasia

Ajanta Cave complex, Buddhist Temples carved into solid rock dating from the 5th Century BC, Ajanta, Maharastra, India

Temple of Apollo, Corinth (Korinthos), Greece, Europe

Archaeological site, Delos, Cyclades Islands, Greek Islands, Greece, Europe

Temples in the ancient pre Angkor capital of Chenla, Cambodia, Indochina, Southeast Asia, Asia

Ajanta Cave complex, Buddhist Temples carved into solid rock dating from the 5th Century BC, Ajanta, Maharastra, India

Buddha statue in cliffs (since destroyed by the Taliban), Bamiyan, Afghanistan

Inca ruins, Machu Picchu, UNESCO World Heritage Site, Peru, South America

Restored section of the Great Wall (Changcheng), northeast of Beijing, Mutianyu, China, Asia

The Citadel with the Buddhist stupa dating from 2nd century AD, from south west, Indus Valley civilization, Mohenjodaro, UNESCO World Heritage Site, Sind (Sindh), Pakistan, Asia

The Great Wall of China, UNESCO World Heritage Site, China, Asia

Housesteads, Hadrian's Wall, Northumberland, England, UK

The Great Wall of China, UNESCO World Heritage Site, Beijing, China, Asia

Ruins of Inca city in morning light, Machu Picchu, UNESCO World Heritage Site, Urubamba Province, Peru, South America

Traditional Basque architecture in the Biskaia Basque region of Northern Spain

Traditional Basque house for sale in the Biskaia Basque region of Northern Spain

Giuseppe De Nittis Art Gallery, Palazzo Della Marra, Barletta, Barletta-Andria-Trani, Apulia, Italy

Alcazar of Seville, UNESCO, Seville, Andalusia, Spain

Cathedral, Trani, Barletta-Andria-Trani, Apulia, Italy

Archaeological Museum, Aragonese castle, Castro, Lecce, Salento, Apulia, Italy, Europe

Printing Museum, Lecce, Salento, Apulia, Italy

Soccorpo Cathedral (Lamia dei Morti) (Cemeterio) (Church of S. Croce), Cathedral of S. Maria Assunta, Gravina, Bari, Alta Murgia, Apulia, Italy

Crypt, Cathedral, Trani, Barletta-Andria-Trani, Apulia, Italy

Basilica of the Holy Sepulchre, Barletta, Barletta-Andria-Trani, Apulia, Italy

View of the theatre and the island, Delos, Cyclades Islands, Greece

Stonehenge, Wiltshire, England, UK

Restored section with watchtowers of the Great Wall (Changcheng), northeast of Beijing, Mutianyu, China, Asia

Housesteads, Hadrian's Wall, Northumberland, England, UK

Fungus on an ancient oak tree in The Cotswolds, Oxfordshire, UK

Castlerigg Stone Circle (the Druid's Circle), Lake District National Park, Cumbria, England, UK, Europe

Eucalyptus tree (gum tree) in Blue Mountains National Park, New South Wales, Australia.

Typical Florentine doorway in Via del Campuccio, Florence, Italy

The Pyramids at dawn, Giza, Egypt

The Pyramids at sunset, Giza, Egypt

Eurasian beaver (Castor fiber) dam on drainage channel in Narew marshes, Podlaskie, Poland. MORE INFO: Beaver activity benefits much other wetland wildlife by helping to maintain high water levels in Poland's ancient marshes and swamp forests.

Temple of Poseidon under sunset sky, Cap Sunion, Greece

Prehistoric, Devonian Landscape

Prehistoric, Triassic Landscape

Prehistoric, Oligocene Landscape

Prehistoric, Jurassic Landscape

Prehistoric, Permo-Carboniferous Landscape

Prehistoric, Miocene Landscape

Prehistoric, Eocene Landscape

Priscacara Fossil, Eocene Sunfish

Totem pole in The Butchart Gardens near Victoria on Vancouver Island, Canada, North America

Roof of Copper Hall, symbolic animal decoration, Xian Tong Temple, Monastery, Wutai Shan, Five Terrace Mountain, Buddhist Centre, town of Taihuai, Shanxi province, China

Vienna Spittel Hundertwasser building in Spittelau

Colosseum amphitheater, Rome, Lazio, Italy, Europe

Colosseum, Rome, Lazio, Italy, Europe

Acropolis in the night-time setting, panoramic view, Athens, Greece, Europe

Windmill at Lerkaka, Oland, Sweden

Windmills at Jordanhsam, Oland, Sweden

Each summer the Sami reindeer herders of Northern Scandinavia face the challenge of ear-marking each of the new calves born to their herd. Using the ancient mark of their family, the small carvings made in the ears allow the herders to recognise their herd whilst they graze. It's a daunting task given the number of reindeer they are responsible for and the vast distances they cover as they graze across the mountain pastures north of the Arctic Circle.Sweden?????s indigenous Sami reindeer herders are demanding state aid to help them cope with the impact of this summer?????s unprecedented drought and wildfires, saying their future is at risk as global warming changes the environment in the far north. The Swedish government this week announced five major investigations aimed at preparing the country for the kind of extreme heatwave it experienced in July, when temperatures exceeded 30C (86F) and forest fires raged inside the Arctic circle.

Each summer the Sami reindeer herders of Northern Scandinavia face the challenge of ear-marking each of the new calves born to their herd. Using the ancient mark of their family, the small carvings made in the ears allow the herders to recognise their herd whilst they graze. It's a daunting task given the number of reindeer they are responsible for and the vast distances they cover as they graze across the mountain pastures north of the Arctic Circle.Sweden?????s indigenous Sami reindeer herders are demanding state aid to help them cope with the impact of this summer?????s unprecedented drought and wildfires, saying their future is at risk as global warming changes the environment in the far north. The Swedish government this week announced five major investigations aimed at preparing the country for the kind of extreme heatwave it experienced in July, when temperatures exceeded 30C (86F) and forest fires raged inside the Arctic circle.

Each summer the Sami reindeer herders of Northern Scandinavia face the challenge of ear-marking each of the new calves born to their herd. Using the ancient mark of their family, the small carvings made in the ears allow the herders to recognise their herd whilst they graze. It's a daunting task given the number of reindeer they are responsible for and the vast distances they cover as they graze across the mountain pastures north of the Arctic Circle.Sweden?????s indigenous Sami reindeer herders are demanding state aid to help them cope with the impact of this summer?????s unprecedented drought and wildfires, saying their future is at risk as global warming changes the environment in the far north. The Swedish government this week announced five major investigations aimed at preparing the country for the kind of extreme heatwave it experienced in July, when temperatures exceeded 30C (86F) and forest fires raged inside the Arctic circle.

Each summer the Sami reindeer herders of Northern Scandinavia face the challenge of ear-marking each of the new calves born to their herd. Using the ancient mark of their family, the small carvings made in the ears allow the herders to recognise their herd whilst they graze. It's a daunting task given the number of reindeer they are responsible for and the vast distances they cover as they graze across the mountain pastures north of the Arctic Circle.Sweden?????s indigenous Sami reindeer herders are demanding state aid to help them cope with the impact of this summer?????s unprecedented drought and wildfires, saying their future is at risk as global warming changes the environment in the far north. The Swedish government this week announced five major investigations aimed at preparing the country for the kind of extreme heatwave it experienced in July, when temperatures exceeded 30C (86F) and forest fires raged inside the Arctic circle.

View of the river and rock cliffs of The Narrows, Zion National Park, Utah, United States of America

Kilclooney Dolmen, County Donegal, Ireland

Poulnabrone Dolmen, The Burren, County Clare, Ireland

Ecuador, Galapagos Archipelago, Santa Cruz Island, Young boy photographing Galapagos Giant Tortoise (Geochelone elephantopus).

Petroglyph, Utah

Petroglyph, Signal Hill, Arizona

Ancient capital, Mdina, Malta

The Treasury;Al-Khazneh), Petra. Monumental building excavated and sculpted in stone in the ancient Jordanian city of Petra. Jordan.

The Monastery;Deir), Petra. Monumental building excavated and sculpted in stone in the ancient Jordanian city of Petra. Jordan.

The Monastery;Deir), Petra. Monumental building excavated and sculpted in stone in the ancient Jordanian city of Petra. Jordan.

Mauritanian travel guide making a tagella (local bread) at a wood fire at a camp in the desert. Chinguetti. Ancient ksour of Ouadane, Chinguetti, Tichitt and Oualata. Adrar. Mauritania

Mauritanian travel guide making a tagella (local bread) at a wood fire at a camp in the desert. Chinguetti. Ancient ksour of Ouadane, Chinguetti, Tichitt and Oualata. Adrar. Mauritania

Mauritanian travel guide making tea at night at a camp in the desert. Chinguetti. Ancient ksour of Ouadane, Chinguetti, Tichitt and Oualata. Adrar. Mauritania

Moorish man wearing a blue draa (traditionnal clothe) near the mosque of Chinguetti. Ancient ksour of Ouadane, Chinguetti, Tichitt and Oualata. Adrar. Mauritania

City and oasis of Chinguetti almost under the sand of the desert. Dunes of the Adrar desert near Chinguetti. Ancient ksour of Ouadane, Chinguetti, Tichitt and Oualata. Adrar. Mauritania

City and oasis of Chinguetti almost under the sand of the desert. Dunes of the Adrar desert near Chinguetti. Ancient ksour of Ouadane, Chinguetti, Tichitt and Oualata. Adrar. Mauritania

Mauritanian travel guide making fire at night at a camp in the desert.. Chinguetti. Ancient ksour of Ouadane, Chinguetti, Tichitt and Oualata. Adrar. Mauritania