The Navajo possess a strong belief system in regards to the natural-supernatural world and have a belief that objects have a supernatural quality. For example, the Navajo consider mountains to be sacred. There are four peaks, which are believed to have supernatural aspects. The mountains each represent a borderline of the original Navajo tribal land. The mountain ranges include Mount Taylor, the San Francisco Peaks, Blanca Peak, and Hesperus Peak located in the La Plata Mountains.