Flash floods have eroded a slot of Navajo sandstone into a natural cathedral at Upper Antelope Canyon, in Antelope Canyon Navajo Tribal Park, Page, Arizona, USA.

Flash floods have eroded a slot of Navajo sandstone into a natural cathedral at Upper Antelope Canyon, in Antelope Canyon Navajo Tribal Park, near Page, Arizona, USA. (The older spelling "Navaho" is no longer used by the Navajo, an American Indian group who call themselves Diné, or Dineh, "The People.")