Navajo National Monument is a National Monument located within the northwest portion of the Navajo Nation territory in northern Arizona, which was established to preserve three well-preserved cliff dwellings of the Ancestral Puebloan people: Keet Seel (Broken Pottery) (), Betatakin (Ledge House) (), and Inscription House (). The monument is high on the Shonto plateau, overlooking the Tsegi Canyon system, west of Kayenta, Arizona. It features a visitor center with a museum, three short self-guided trails, two small campgrounds, and a picnic area. The Sandal Trail is an accessible self-guided roundtrip trail that ends at an overlook of the Betatakin ruins across the 560-foot-deep (170 m) Betatakin Canyon. The overlook is the only point in the monument where visitors can view the cliff dwelling other than on the guided tours. Rangers guide visitors on free (3-5 hour long) tours of the Betatakin cliff dwellings and on roundtrip back-country hikes to the Keet Seel. The Inscription House site, further west, has been closed to public access for many years. The National Monument was listed on the National Register of Historic Places on October 15, 1966. Keet Seel Keet Seel or Kiet Siel (), which stands for "broken pottery scattered around" in Navajo, is a well preserved cliff dwelling of the ancient Ancestral Pueblo people located in a branch of the Tsegi Canyon in the Kayenta region. The site was first occupied at around 1250, during a time in which a large number of people were believed to be aggregating in sites such as this in this part of the American Southwest. There was a construction boom at Keet Seel between 1272 and 1275, with construction then slowly tapering off and halting completely at 1286. Once construction halted in 1286, there was no evidence of structures being built until its subsequent abandonment some 20 years later. It is believed that, at its peak, up to 150 people inhabited this site at one time. Due to the extremely dry climate and natural overhanging cliff the site's dwellings and artifacts are well preserved. Keet Seel is considered by many archaeological experts to be one of the best preserved larger ruins in the American Southwest. Betatakin Betatakin means "House Built on a Ledge" in Navajo. In Hopi, the name of the place is Talastima, or "Place of the Corn Tassel". Betatakin is smaller than nearby Keet Seel, with about 120 rooms at the time of