Mesa Verde National Park, USA
"A great concentration of ancestral Pueblo Indian dwellings, built from the 6th to the 12th century, can be found on the Mesa Verde plateau in south-west Colorado at an altitude of more than 2,600 m. Some 4,400 sites have been recorded, including villages built on the Mesa top. There are also imposing cliff dwellings, built of stone and comprising more than 100 rooms." - Source: UNESCO World Heritage
Cliff Palace is the largest cliff dwelling of the ancestral Puebloan people between AD 600 to 1300. Over 600 cliff dwellings found in the Mesa Verde National Park of Arizona. Thanks to Carol of Arizona for this card.