Antelope Canyon is the most-visited and most-photographed slot canyon in the American Southwest. It is located on Navajo land near Page, Arizona. Antelope Canyon includes two separate, photogenic slot canyon sections, referred to individually as Upper Antelope Canyon or The Crack; and Lower Antelope Canyon or The Corkscrew.
Antelope Canyon was formed by erosion of Navajo Sandstone, primarily due to flash flooding and secondarily due to other sub-aerial processes. Rainwater, especially during monsoon season, runs into the extensive basin above the slot canyon sections, picking up speed and sand as it rushes into the narrow passageways.
Antelope Canyon is a popular location for photographers and sightseers, and a source of tourism business for the Navajo Nation. It has been accessible by permit only since 1997, when the Navajo Tribe made it a Navajo Tribal Park.