Navajo National Monument, in the northeastern corner of Arizona, covers 146 ha (360 acres) within the Navajo Indian Reservation; it contains three of the most extensive and elaborate cliff dwellings in the United States. Established as a monument in 1909, the Anasazi remains — named Betatakin, Keet Seel, and Inscription House — are extremely well preserved and date from about a.d. 300-1300. Keet Seel, the largest single cliff dwelling in Arizona, is known as the "broken pottery" village; it contains more than 150 rooms and a half dozen ceremonial chambers in a cavity that measures 107 by 15 m (350 by 50 ft). Betatakin, which means "hillside house," was built on the floor of a massive sandstone cave whose roof projected far out over the dwellings. This pueblo contains 53 dwellings, 26 storage rooms, 2 ceremonial chambers, 2 rooms for grinding corn, open courts, and 39 other rooms at various levels. Inscription House — with 67 rooms, the smallest of the dwellings — contains Spanish inscriptions that date back to 1661; because of its fragility it has been closed to the public since 1968.

Surrounding canyons, where pinon pines, cottonwoods, willows, and Utah junipers abound.