Remains of the homes of ancient cliff dwellers in Canyon de Chelly (pronounced duh-SHAY), a vast park on Navajo tribal lands in northeastern Arizona, near the town of Chinle, that is now a U.S. national monument. Reflecting one of the longest continuously inhabited landscapes of North America, the park preserves ruins of the indigenous tribes that lived in the area, from the Ancestral Puebloans (formerly known as Anasazi) to the Navajo. The monument covers 83,840 acres (and encompasses the floors and rims of the three major canyons: de Chelly, del Muerto, and Monument. These canyons were cut by streams with headwaters in the Chuska Mountains just to the east of the monument. Photo by Carol Highsmith, 2018.