Acik Saray (Open Palace) Museum, AD 900- 1000, Gulsehir, Cappadocia Region, Anatolia, Turkey, Asia Minor, Asia

Cave Houses, Pigeon Valley, Goreme, Cappadocia Region, Nevsehir Province, Anatolia, Turkey, Asia Minor, Asia

Cave Houses, Pigeon Valley, Goreme, Cappadocia Region, Nevsehir Province, Anatolia, Turkey, Asia Minor, Asia

Aerial of Sassi di Matera in fog, UNESCO World Heritage Site, Basilicata, Italy, Europe

Cave Temple on Elephanta Island, UNESCO World Heritage Site, Mumbai (Bombay), Maharashtra, India, Asia

Wide view of the ancient cave city of Matera at sunset, Matera, Basilicata, Italy, Europe

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

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

Cave Houses, Pigeon Valley, Goreme, Cappadocia Region, Nevsehir Province, Anatolia, Turkey, Asia Minor, Asia

Cave Houses, Pigeon Valley, Goreme, Cappadocia Region, Nevsehir Province, Anatolia, Turkey, Asia Minor, Asia

Cave Houses, Pigeon Valley, Goreme, Cappadocia Region, Nevsehir Province, Anatolia, Turkey, Asia Minor, Asia

Al Nazar Church (Cave Church), 10th century, Goreme, UNESCO World Heritage Site, Nevsehir Merkez, Nevsehir, Anatolia, Turkey, Asia Minor, Asia

Acik Saray (Open Palace) Museum, AD 900- 1000, Gulsehir, Cappadocia Region, Anatolia, Turkey, Asia Minor, Asia

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

Kiev-Pechersk Lavra, Cave monastery, UNESCO World Heritage Site, Kiev, Ukraine, Europe

Sassi di Matera, UNESCO World Heritage Site, Basilicata, Italy, Europe

Al Deir (Monastery) monument at sunset, carved into the mountain side and framed by a cave, Petra, UNESCO World Heritage Site, Jordan, Middle East

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

Huyen Khong cave, Marble Mountain, Sanctuary, Danang, Vietnam, Indochina, Southeast Asia, Asia

Kiev-Pechersk Lavra, Cave monastery, UNESCO World Heritage Site, Kiev, Ukraine, Europe

View towards the Cave of the Apocalypse Church, Patmos Island, Dodecanese, Greek Islands, Greece, Europe

Exterior of Hpo Win Daung Caves (Phowintaung Caves), Monywa, Myanmar (Burma), Asia

Dambulla Rock Cave Temple, UNESCO World Heritage Site, Central Province, Sri Lanka, Asia

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

Kiev-Pechersk Lavra, Cave monastery, UNESCO World Heritage Site, Kiev, Ukraine, Europe

Entrance, Kiev-Pechersk Lavra, Cave monastery, UNESCO World Heritage Site, Kiev, Ukraine, Europe

Chapel of Panagia Sarantaskaliotissa at the entrance to The Cave of Pythagoras, Mount Kerkis, Samos Island, North Aegean, Greek Islands, Greece, Europe

Tower Ruins, Ancestral Pueblo, up to 1000 years old, Coomb Ridge area, Utah, United States of America, North America

Tiger statues at the Tiger Cave Temple in Krabi, Thailand, Southeast Asia, Asia

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

Bedroom window of cave accommodation, Belerda, near Guadix, Andalucia, Spain, Europe

Entrance, Kiev-Pechersk Lavra, Cave monastery, UNESCO World Heritage Site, Kiev, Ukraine, Europe

Entrance to the Cave Chapel, Panagia Spiliani Monastery, Pythagoreio, Samos Island, North Aegean, Greek Islands, Greece, Europe

Devi Jagadambika and Kandariya Mahadeva Temple (the Great God of the Cave), Khajuraho Group of Monuments, UNESCO World Heritage Site, Madhya Pradesh state, India, Asia

Cave Houses, Pigeon Valley, Goreme, Cappadocia Region, Nevsehir Province, Anatolia, Turkey, Asia Minor, Asia

Panchapandava Cave Temple, UNESCO World Heritage Site, Mahabalipuram, Tamil Nadu, India, Asia

David Gareja Monastery complex, Sagarejo Municipality, Kakhetia, Georgia, Central Asia, Asia

Cave dwellings, Garphu, Kingdom of Mustang, Himalayas, Nepal, Asia

Caves carved in the stone of the mountain inside, Petra, UNESCO World Heritage Site, Jordan, Middle East

Trimurti Cave, Mahabalipuram, UNESCO World Heritage Site, Tamil Nadu, India, Asia

Cave Temple on Elephanta Island, UNESCO World Heritage Site, Mumbai (Bombay), Maharashtra, India, Asia

Cave dwellings, Garphu, Kingdom of Mustang, Himalayas, Nepal, Asia

Cave dwellings, Sasso Barisano, UNESCO World Heritage Site, Matera, Basilicata, Puglia, Italy, Europe

The caves at Ajanta, Deccan Hills, Maharashtra State, India

The finely carved late 5th century Buddhist Chaitya Hall, Cave 19, Ajanta Caves, UNESCO World Heritage Site, Maharashtra state, India, Asia

Underground cave dwelling, Matmata, Tunisia, North Africa, Africa

Kailasa Hindu temple, 1200 years old, carved in in-situ basalt bedrock, Ellora, UNESCO World Heritage Site, Maharashtra, India, Asia

Kailasa Hindu temple, 1200 years old, carved in in-situ basalt bedrock, Ellora, UNESCO World Heritage Site, Maharashtra, India, Asia

Cliff temples, Ellora, UNESCO World Heritage Site, near Aurangabad, Maharashtra, India, Asia

Rock-cut Kailasa temple, Ellora, UNESCO World Heritage Site, near Aurangabad, Maharashtra, India, Asia

Seven Buddhas under a tree, Cave 12, Ellora, UNESCO World Heritage Site, Maharashtra state, India, Asia

Shiva the great ascetic, Kailasa, Ellora, UNESCO World Heritage Site, Maharashtra state, India, Asia

Nun inside the Church of the Nativity (birth place of Jesus Christ), Bethlehem, Israel, Middle East

Giant Golden Buddha statue at Dambulla cave temple complex, UNESCO World Heritage Site, Sri Lanka, Asia

Saddar Cave, near Hpa-An, Karen State, Myanmar (Burma), Asia

Wieliczka Salt Mine Tourist Route, Chapel of St. Kinga staircase in Kopalnia soli Wieliczka, UNESCO World Heritage Site, Krakow, Poland, Europe

Wieliczka Salt Mine Tourist Route, Chapel of St. Kinga with chandeliers in Kopalnia soli Wieliczka, UNESCO World Heritage Site, Krakow, Poland, Europe

Wieliczka Salt Mine Tourist Route, Chapel of St. Kinga with carved details in Kopalnia soli Wieliczka, UNESCO World Heritage Site, Krakow, Poland, Europe

Salt Cathedral, interior, Zipaquira, Cundinamarca Department, Colombia, South America

Salt Cathedral, interior, Zipaquira, Cundinamarca Department, Colombia, South America

Salt Cathedral, interior, Zipaquira, Cundinamarca Department, Colombia, South America

Salt Cathedral, interior, Zipaquira, Cundinamarca Department, Colombia, South America

Pindaya Cave Festival, Pindaya, Shan State, Myanmar (Burma), Asia

Pindaya Cave Festival, Pindaya, Shan State, Myanmar (Burma), Asia

People at Dambulla cave Buddhist temple complex, UNESCO World Heritage Site, Sri Lanka, Asia

Cave (wine shop) on old Rue de la Cadene in this historic town and famous Bordeaux red wine region, Saint Emilion, Gironde, France, Europe

Buddhist cave temple, 1500 years old, carved in in-situ Deccan basalt, Ajanta, UNESCO World Heritage Site, Maharashtra, India, Asia

Cappadocia Cave Hotel, Goreme, Cappadocia, Anatolia, Turkey, Asia Minor, Asia

Pindaya Cave Festival, Pindaya, Shan State, Myanmar (Burma), Asia

Catacombs of Santa Savinilla, Nepi, Viterbo, Lazio, Italy, Europe

Dambulla Cave Temples, UNESCO World Heritage Site, Dambulla, Central Province, Sri Lanka, Asia

Pindaya Cave Festival, Pindaya, Shan State, Myanmar (Burma), Asia

Catacombs of Santa Savinilla, Nepi, Viterbo, Lazio, Italy, Europe

Underground cave dwelling, Matmata, Tunisia, North Africa, Africa

Cave dwellings, near Goreme, Cappadocia, Anatolia, Turkey, Asia Minor, Asia

Kiev-Pechersk Lavra, Cave monastery, UNESCO World Heritage Site, Kiev, Ukraine, Europe

House in rock, Cappadocia, Anatolia, Turkey, Asia Minor, Asia

Cave dwellings, near Goreme, Cappadocia, Anatolia, Turkey, Asia Minor, Asia

TURKEY Goreme Open Air Museum, Cappadocia. Exterior of Cave Churches. Tokali church

The monastery at the entrance to Ialomicioara Cave in the Bucegi mountains of the Transylvania region of central Romania, Europe

The monastery at the entrance to Ialomicioara Cave in the Bucegi mountains of the Transylvania region of central Romania, Europe

Ancient cave houses dug into Loess deposits in Shanxi province, northern China, Asia

Ancient cave houses dug into Loess deposits in Shanxi province, northern China, Asia

Ancient cave house dug into Loess deposits in Shanxi province, northern China, Asia

Ancient cave houses dug into Loess deposits in Shanxi province, northern China, Asia

Rocks framing Golden Gate Bridge, San Francisco, California, United States

Inside Basílica de Santa María la Real de Covadonga catholic church in Cangas de Onis, Picos de Europa, Asturias, Spain, Europe. In 1777 a fire destroyed the old temple, which stood adjacent to the Holy Cave where Our Lady of Covadonga is revered. It was then decided to raise a new church as a monumental sanctuary, raising donations from all of Spain; the plan was opposed by the local council, as the canons wanted to rebuild the temple of the Holy Cave and build an ambitious sanctuary that had once been designed by Ventura Rodríguez, but never completed. One century later, the project was resumed by King Alfonso XII of Spain, who was interested in completing this work. The classic design of Ventura Rodríguez was very difficult and expensive and was replaced by a new neo-Medieval design.

Our Lady of Covadonga. The Blessed Virgin Mary, and a Marian shrine devoted to her at Basílica de Santa María la Real de Covadonga catholic church in Cangas de Onis, Picos de Europa, Asturias, Spain, Europe. In 1777 a fire destroyed the old temple, which stood adjacent to the Holy Cave where Our Lady of Covadonga is revered. It was then decided to raise a new church as a monumental sanctuary, raising donations from all of Spain; the plan was opposed by the local council, as the canons wanted to rebuild the temple of the Holy Cave and build an ambitious sanctuary that had once been designed by Ventura Rodríguez, but never completed. One century later, the project was resumed by King Alfonso XII of Spain, who was interested in completing this work. The classic design of Ventura Rodríguez was very difficult and expensive and was replaced by a new neo-Medieval design.

Virgen de Covadonga, Virgin Mary at the holy cave Santa Cueva de Covadonga, Covadonga, Picos de Europa, Province of Asturias, Principality of Asturias, Northern Spain, Spain, Europe

horses, prehistoric painting, cave painting, about 15000 BC, Cueva de Tito Bustillo, cave near Ribadesella, replica, Parque de la Prehistoria de Teverga, Teverga, Park of Prehistory in Teverga, province of Asturias, Principality of Asturias, Northern Spain, Spain, Europe

Pilgrimage church and holy cave Santa Cueva de Covadonga in the evening, Covadonga, Picos de Europa, province of Asturias, Principality of Asturias, Northern Spain, Spain, Europe

Horse, prehistoric painting, cave painting, about 15000 BC, Caballo del Camarin, Cueva de la Pena de Cadamo, cave, San Roman de Cadamo, near, Pravia, replica, Parque de la Prehistoria de Teverga, Teverga, Park of Prehistory in Teverga, province of Asturias, Principality of Asturias, Northern Spain, Spain, Europe

Bisons, prehistoric painting, cave painting, about 15000 BC, Covaciella, Asturias, replica, Parque de la Prehistoria de Teverga, Teverga, Park of Prehistory in Teverga, province of Asturias, Principality of Asturias, Northern Spain, Spain, Europe

Horses, prehistoric painting, cave painting, about 15000 BC, Cueva de Tito Bustillo, cave near Ribadesella, replica, Parque de la Prehistoria de Teverga, Teverga, Park of Prehistory in Teverga, province of Asturias, Principality of Asturias, Northern Spain, Spain, Europe

Horses, prehistoric painting, cave painting, about 15000 BC, Cueva de Tito Bustillo, cave near Ribadesella, replica, Parque de la Prehistoria de Teverga, Teverga, Park of Prehistory in Teverga, province of Asturias, Principality of Asturias, Northern Spain, Spain, Europe

horses, prehistoric painting, cave painting, about 15000 BC, Cueva de Tito Bustillo, cave near Ribadesella, replica, Parque de la Prehistoria de Teverga, Teverga, Park of Prehistory in Teverga, province of Asturias, Principality of Asturias, Northern Spain, Spain, Europe

Horse, prehistoric painting, cave painting, about 15000 BC, Caballo del Camarin, Cueva de la Pena de Cadamo, cave, San Roman de Cadamo, near Pravia, replica, Parque de la Prehistoria de Teverga, Teverga, Park of Prehistory in Teverga, province of Asturias, Principality of Asturias, Northern Spain, Spain, Europe

Horse, prehistoric painting, cave painting, about 15000 BC, Caballo del Camarin, Cueva de la Pena de Cadamo, cave, San Roman de Cadamo, near, Pravia, replica, Parque de la Prehistoria de Teverga, Teverga, Park of Prehistory in Teverga, province of Asturias, Principality of Asturias, Northern Spain, Spain, Europe

Bison, prehistoric painting, cave painting, about 25000 BC, Cueva de Altamira, Hoehle bei San Santillana del Mar, Kantabrien replica, Parque de la Prehistoria de Teverga, Teverga, Park of Prehistory in Teverga, province of Asturias, Principality of Asturias, Northern Spain, Spain, Europe

Reinhold Messner mountain museum, Sigmundskron castle, Bozen, Alto Adige, South Tyrol, Italy