Richard Wetherill (1858–1910), a member of a Colorado ranching family, was an amateur archaeologist who discovered, researched and excavated sites associated with the Ancient Pueblo People. He is credited with the rediscovery of Cliff Palace in Mesa Verde in Colorado and was responsible for initially selecting the term Anasazi, Navajo for ancient enemies, as the name for these ancient people. He also excavated Kiet Seel ruin, now in Navajo National Monument in northeastern Arizona, and Pueblo Bonito in Chaco Canyon, New Mexico.