United States. National Park Service 
Montezuma Castle National Monument (1959) 

Montezuma Castle National Monument, in the Verde Valley of central Arizona, protects one of the best preserved and most interesting cliff dwellings in the United States. Within the monument, occupying part of a limestone cliff which borders Beaver Creek for half a mile, are the ruins of several prehistoric Indian house clusters. Among them is the large structure called Montezuma Castle, which is about 90 percent intact and original.