Canyon de Chelly, 1904, by Edward S. Curtis

Canyon de Chelly National Monument (pron.: /dəˈʃeɪ/ də·shā′) was established on April 1, 1931 as a unit of the National Park Service. It is located in northeastern Arizona within the boundaries of the Navajo Nation. Reflecting one of the longest continuously inhabited landscapes of North America, it preserves ruins of the early indigenous tribes that lived in the area, including the Ancient Pueblo Peoples (also called Anasazi) and Navajo. The monument covers 83,840 acres (131.0 sq mi; 339.3 km

• http://en.wikipedia.org/wiki/Canyon de Chelly National Monument