The Anasazi or the Ancestral Puebloans were a group prehistoric people that inhabited the Four Corners area of the American Southwest (the region surrounding the junction of Utah, Arizona, New Mexico and Colorado). The Anasazi are famous for their stone and adobe dwellings that were often located on inaccessible cliff faces requiring ropes or treacherous rock climbing to access. Today, there are many well preserved settlements maintained by the National Park Service that one can visit.