La grotte de la ville de Pétra, en Jordanie - Photo & image de stock

Ancient Mogollon Ruins at Gila Cliff Dwellings National Monument in the Gila Wilderness, New Mexico

Old Wooden Beams Span The Gap Holding Stone Walls Up in Mug House in Mesa Verde National Park

The caves inside thecastle of Sperlinga, Sicily, on a rock in one of the most beautiful Italian borgo village

Long House - Mesa Verde National Park

Traveling through Georgia in spring cave town vardsia old monastery

The paths inside Selime Cathedral. Selime Monastery in Cappadocia, Turkey. Selime is town at the end of Ihlara Valley. The Monastery is one of the largest religious buildings. Cave formations.

Gila Cliff Dwellings National Monument, New Mexico

Cave Church in Zelve Valley, Cappadocia, Turkey