832-67323 - A park ranger watches as visitors climb a ladder to enter the Balcony House cliff dwelling at Mesa Verde National Park, featuring cliff dwellings of ancestral Puebloans that are nearly a thousand years old, Cortez, Colorado, USA
832-67324 - A park ranger climbs a ladder to enter the Balcony House cliff dwelling at Mesa Verde National Park, featuring cliff dwellings of ancestral Puebloans that are nearly a thousand years old, Cortez, Colorado, USA
832-67325 - Visitors tour the Spruce Tree House cliff dwelling at Mesa Verde National Park, featuring cliff dwellings of ancestral Puebloans that are nearly a thousand years old, Cortez, Colorado, USA
321-3788 - Panoramic view of the town of Uchisar with its old houses and ancient cave dwellings in the volcanic tufa, Cappadocia, Anatolia, Turkey, Asia Minor, Asia
321-3798 - Ancient cave dwellings in the tufa formations at Goreme Open Air Museum, Goreme, UNESCO World Heritage Site, Cappadocia, Anatolia, Turkey, Asia Minor, Asia