Aerial of tombs carved in sandstone rock of Jabal Banat (Qasr al-Bint), Hegra (Madain Salih), UNESCO, AlUla area, Medina Province, Saudi Arabia

Aerial of tombs carved in sandstone rock of Jabal Banat (Qasr al-Bint), Hegra (Madain Salih), UNESCO, AlUla area, Medina Province, Saudi Arabia

Aerial view of red sandstone formation, in the area of AlUla, Medina Province, Saudi Arabia

Aerial view of the Jabal Alfil (Elephant Rock), a natural red sandstone formation, in the area of AlUla, Medina Province, Saudi Arabia

Swimming pool of Our Habitas AlUla, a sustainable resort in an ancient oasis in desert canyon, the Ashar Valley, Medina Province, Saudi Arabia

Passage through the Siq channel at Jabal Ithlib area within the Site of Hegra (Madain Salih), UNESCO, AlUla, Medina Province, Saudi Arabia

Passage through the Siq channel at Jabal Ithlib area within the Site of Hegra (Madain Salih), UNESCO, AlUla, Medina Province, Saudi Arabia

Guide in the sacred part of Jabal Ithlib area within the Site of Hegra (Madain Salih), UNESCO, AlUla, Medina Province, Saudi Arabia

Passage through the Siq channel at Jabal Ithlib area within the Site of Hegra (Madain Salih), UNESCO, AlUla, Medina Province, Saudi Arabia

Tomb carved into sandstone rock of Jabal Banat (Qasr Al-Bint) area in site of Hegra (Madain Salih), UNESCO, AlUla, Medina Province, Saudi Arabia

Tombs carved into sandstone rock of Jabal Banat (Qasr Al-Bint) area in site of Hegra (Madain Salih), UNESCO, AlUla, Medina Province, Saudi Arabia

Tombs carved into sandstone rock of Jabal Banat (Qasr Al-Bint) area in site of Hegra (Madain Salih), UNESCO, AlUla, Medina Province, Saudi Arabia

Tombs carved into sandstone rock of Jabal Banat (Qasr Al-Bint) area in site of Hegra (Madain Salih), UNESCO, AlUla, Medina Province, Saudi Arabia

Tombs carved into sandstone rock of Jabal Banat (Qasr Al-Bint) area in site of Hegra (Madain Salih), UNESCO, AlUla, Medina Province, Saudi Arabia

Tomb pediment carved into sandstone rock of Jabal Banat (Qasr Al-Bint) in Hegra (Madain Salih), UNESCO, AlUla, Medina Province, Saudi Arabia

Tombs carved into sandstone rock of Jabal Banat (Qasr Al-Bint) area in site of Hegra (Madain Salih), UNESCO, AlUla, Medina Province, Saudi Arabia

Tomb of Lihyan, son of Kuza (Qasr al-Farid), carved into sandstone outcrop within the Site of Hegra, UNESCO, AlUla, Medina Province, Saudi Arabia

Tombs carved into sandstone rock of Jabal Banat (Qasr Al-Bint) area in site of Hegra (Madain Salih), UNESCO, AlUla, Medina Province, Saudi Arabia

Woman at Tomb of Lihyan, son of Kuza (Qasr al-Farid), carved into sandstone outcrop in Hegra, UNESCO, AlUla, Medina Province, Saudi Arabia

Tombs carved into the sandstone rock of Jabal Banat (Qasr al-Bint) area within site of Hegra, UNESCO, AlUla, Medina Province, Saudi Arabia

Tombs carved into the sandstone rock of Jabal Banat (Qasr al-Bint) area within site of Hegra, UNESCO, AlUla, Medina Province, Saudi Arabia

Jabal Alfil (Elephant Rock) by night, a natural red sandstone formation in the area of AlUla, Medina Province, Saudi Arabia

Jabal Alfil (Elephant Rock) by night, a natural red sandstone formation in the area of AlUla, Medina Province, Saudi Arabia

Rock formations in the oasis Tigui, Tibesti Mountains, Chad

Rock formations in the oasis Tigui, Tibesti Mountains, Chad

Rock art on a rock formation in Tigui, Tibesti Mountains, Chad

Rock art on a rock formation in Tigui, Tibesti Mountains, Chad

Star Wars looking oasis Tigui, Tibesti Mountains, Chad

Star Wars looking oasis, Tigui, Tibesti Mountains, Chad

Beautiful rock formations around Zouar, Tibesti Mountains, Chad

Aerial of beautiful rock formations around Zouar, Tibesti Mountains, Chad

Aerial of beautiful rock formations around Zouar, Tibesti Mountains, Chad

Three Sisters, Monument Valley Navajo Tribal Park, Utah, United States of America

Totem Pole and Yei Bi Chei, Monument Valley Navajo Tribal Park, Utah, United States of America

Stairway to Dala hill historic iron working place, Kano, Nigeria

Dala hill historic iron working place, Kano, Nigeria

Mosque in the palm grove in the oasis of AlUla, Medina Province, Saudi Arabia

Hot air balloon flight over Hegra site and around with Hero Balloon Flights Saudi Operator, AlUla, Medina Province, Saudi Arabia

Aerial view from hot air balloon over Hegra site and around, AlUla, Medina Province, Saudi Arabia

Aerial view from hot air balloon over Hegra site and around, AlUla, Medina Province, Saudi Arabia

Cave of Elafonisos island with orange rock color painted in white, Greece

Meteora, ancient holy Monastery of Varlaam, UNESCO, Kalabaka, Greece

Meteora, ancient holy Monastery of Varlaam, UNESCO, Kalabaka, Greece

Safari tour among the magnificent sandstone rock structures in the Sharaan Nature Reserve, AlUla, Medina Province, Saudi Arabia

Mountainscape viewed from the top of Harrat volcanic plateau, AlUla, Medina Province, Saudi Arabia

Remarkable sandstone rock carved by erosion in the Ashar Valley, AlUla, Medina Province, Saudi Arabia

Aerial view of Qasr al-Farid, the largest tomb within Site of Hegra (Madain Salih), UNESCO, in the area of AlUla, Medina Province, Saudi Arabia

Passage through the Siq channel at Jabal Ithlib area within the Site of Hegra (Madain Salih), UNESCO, AlUla, Medina Province, Saudi Arabia

Palm grove in the oasis of AlUla, Medina Province, Saudi Arabia

Hot air balloon flight over Hegra site and around with Hero Balloon Flights Saudi Operator, AlUla, Medina Province, Saudi Arabia

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

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

Foggy sky over the earth pyramids, ancient rock formation, Renon (Ritten), Bolzano, South Tyrol, Italy, Europe

Castellana caves (Castellana Grotte), Apulia, Italy, Europe

Hagar Qim, a megalithic temple, UNESCO World Heritage Site, Malta, Europe

Beida (Al Baidha) (Little Petra), Nabatean site near Petra, Jordan, Middle East

Ahu Akivi, an inland ahu, Easter Island, Chile, Pacific

Necropolis, Facade Street, Petra, UNESCO World Heritage Site, Jordan, Middle East

Standing stones, Carnac, Brittany, France, Europe

Mnajdra, a Megalithic temple constructed at the end of the third millennium BC, UNESCO World Heritage Site, Malta, Europe

Mnajdra, a Megalithic temple constructed at the end of the third milennium BC, UNESCO World Heritage Site, Malta, Europe

Hagar Qim, a megalithic temple, UNESCO World Heritage Site, Malta, Europe

Mnajdra, a Megalithic temple constructed at the end of the third millennium BC, UNESCO World Heritage Site, Malta, Europe

Mnajdra, a Megalithic temple constructed at the end of the third millennium BC, UNESCO World Heritage Site, Malta, Europe

Stonehenge, Wiltshire, England, UK

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

Aerial views of El Castillo and the Ruins of the Mayan temple grounds at Tulum, Quintana Roo, Yucatan, Mexico. Tulum is the site of a pre-Columbian Mayan walled city which served as a major port for Coba, in the Mexican state of Quintana Roo. The ruins are situated on 12 meter 39 ft tall cliffs along the east coast of the Yucatán Peninsula on the Caribbean Sea in the state of Quintana Roo, Mexico. Tulum was one of the last cities built and inhabited by the Maya; it was at its height between the 13th and 15th centuries and managed to survive about 70 years after the Spanish began occupying Mexico. Old World diseases brought by the Spanish settlers appear to have resulted in very high fatalities, disrupting the society, and eventually causing the city to be abandoned.

Aerial views of El Castillo and the Ruins of the Mayan temple grounds at Tulum, Quintana Roo, Yucatan, Mexico. Tulum is the site of a pre-Columbian Mayan walled city which served as a major port for Coba, in the Mexican state of Quintana Roo. The ruins are situated on 12 meter 39 ft tall cliffs along the east coast of the Yucatán Peninsula on the Caribbean Sea in the state of Quintana Roo, Mexico. Tulum was one of the last cities built and inhabited by the Maya; it was at its height between the 13th and 15th centuries and managed to survive about 70 years after the Spanish began occupying Mexico. Old World diseases brought by the Spanish settlers appear to have resulted in very high fatalities, disrupting the society, and eventually causing the city to be abandoned.

Aerial view of Mayan Ruin of Chichen Itza Archaeological Site Yucatan Peninsula, Quintana Roo, Caribbean Coast, Mexico

El Castillo, The Pyramid of Kukulkán, is the Most Popular Building in the UNESCO Mayan Ruin of Chichen Itza Archaeological Site Yucatan Peninsula, Quintana Roo, Caribbean Coast, Mexico. Asian tour leder dressed in a maya style.

Gran Cenote de Tulum in Yucatan Peninsula, Quintana Roo, Mexico. There are thousands of cenotes dotted all over Mexico���s Yucatan Peninsula, and their existence is as much a defining characteristic of the region as is the distinct geological feature from which they result. Once revered by the ancient Mayans as sacred wells, they are now magnets for tourists, adventurers, and explorers alike.

The Great Ball Court in the Mayan Ruins of Chichen Itza Archaeological Site Yucatan Peninsula, Quintana Roo, Caribbean Coast, Mexico

Aerial view of Mayan Ruin of Chichen Itza Archaeological Site Yucatan Peninsula, Quintana Roo, Caribbean Coast, Mexico

Stony stairs of tomb of the High Priest pyramid at Chichen Itza Archaeological Site in Yucatan Peninsula, Quintana Roo, Caribbean Coast, Mexico

The Church and Nunnery at Chichen Itza Archaeological Site in Yucatan Peninsula, Quintana Roo, Caribbean Coast, Mexico

Portal Maya sculpture Mayan Gateway situated in Parque Fundadores by sculptor Jose Arturo Tavares in Playa del Carmen, Riviera Maya, Quintana Roo, Mexico

El Castillo, The Pyramid of Kukulkán, is the Most Popular Building in the UNESCO Mayan Ruin of Chichen Itza Archaeological Site Yucatan Peninsula, Quintana Roo, Caribbean Coast, Mexico

El Castillo, The Pyramid of Kukulkán, is the Most Popular Building in the UNESCO Mayan Ruin of Chichen Itza Archaeological Site Yucatan Peninsula, Quintana Roo, Caribbean Coast, Mexico

El Castillo, The Pyramid of Kukulkán, is the Most Popular Building in the UNESCO Mayan Ruin of Chichen Itza Archaeological Site Yucatan Peninsula, Quintana Roo, Caribbean Coast, Mexico

Serpent head sculpture in Mayan Ruin of Chichen Itza Archaeological Site in Yucatan Peninsula, Quintana Roo, Caribbean Coast, Mexico

Knight's festival, Castle Oberkapfenberg, Kapfenberg, Styria, Austria

TRUPACT shipping containers used to transport radioactive waste are moved at the Waste Isolation Pilot Plant; nuclear waste from America's nuclear weapons program is shipped by truck from all over the country to be stored in rooms carved out of an ancient

Radioactive plutonium and americium waste from America's nuclear weapons program in TRUPACT shipping containers at the Waste Isolation Pilot Plant; nuclear waste is shipped by truck from all over the country to be stored in rooms carved out of an ancient

Containers filled with transuranic nuclear waste from America's nuclear weapons program await burial at the Waste Isolation Pilot Plant; the radioactive materials are then stored in rooms carved out of an ancient salt formation a half mile below the Chihu

Workers prepare transuranic nuclear waste from America's nuclear weapons program for long-term storage at the Waste Isolation Pilot Plant, here a fork lift moves a TRUPACT shipping container used to transport nuclear waste by truck from distant places.; t

Workers prepare transuranic nuclear waste from America's nuclear weapons program for long-term storage at the Waste Isolation Pilot Plant, here a worker checks radiation levels on the outside of storage containers because they are stored in rooms carved o

Brass tags are used to account for every person going underground at the Waste Isolation Pilot Plant, where radioactive waste from America's nuclear weapons program is stored in an ancient salt formation a half mile below, Carlsbad, New Mexico, USA

Holocaust memorial in Berlin, Germany

Holocaust memorial in Berlin, Germany

Castle Oberkapfenberg, Kapfenberg, Styria, Austria

Grass over a rock formation, Masada, Israel

Poulnabrone Dolmen, The Burren, County Clare, Ireland

Kilclooney Dolmen, County Donegal, Ireland

Stone Circle In A Country Field, Co Meath, Slieve Na Calliagh, Ireland

View of geometric patterns on rocky hills referred to as Brain Rocks, against a cloudy sky forming part of the alien landscape of amazing lines, contours and shapes in the wondrous area known as White Pocket, situated in Arizona, Arizona, United States of America

Surreal landscape of White Pocket with stormy clouds gathering overtop. They are comprised of swirling, multicolured Navajo Limestone with domes, hoodoos and potholes, Arizona, United States of America

Kilclooney Dolmen, County Donegal, Ireland

Woman standing under the large, boulders on the seaside shores of The Baths, a famous beach in the BVI's, Virgin Gorda, British Virgin Islands, Caribbean

Stunning view of the sandy beach with surf forming a zigzag pattern in the foam next to the large, boulders lining the shores at The Baths, a famous beach in the BVI's, Virgin Gorda, British Virgin Islands, Caribbean

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