The famously narrow Antelope Slot Canyons are located on Navajo land near Page, Arizona. The canyons are continually being formed by flash flooding during the monsoon season when rainwater runs into the extensive basin above the canyon and picks up speed and sand as it rushes through the passageways. While a seemingly tranquil spot, it comes with a great degree of danger. In 1997 eleven tourists were killed in Lower Antelope Canyon by a flash flood. Even though little rain fell that day, much water had accumulated in the basin upstream.
The small cracks at the top of the canyon let light in to illuminate the red rock and at the right time of day light beams shine through.