Canyon de Chelly is entirely owned by the Navajo Tribal Trust of the Navajo Nation. It is the only National Park Service unit that is owned and cooperatively managed in this manner. About 40 Navajo families live in the park. Access to the canyon floor is restricted, and visitors are allowed to travel in the canyons only when accompanied by a park ranger or an authorized Navajo guide.The only exception to this rule is the White House Ruin Trail.The park’s distinctive geologic feature, Spider Rock, is a sandstone spire that rises 750 feet (229 m) from the canyon floor at the junction of Canyon de Chelly and Monument Canyon. Spider Rock can be seen from South Rim Drive. It has served as the scene of a number of television commercials. According to traditional Navajo beliefs, the taller of the two spires is the home of Spider Grandmother.
