Antelope Canyon, United States
The Antelope Canyon is both the most visited and most photographed slot canyon in the American Southwest. One glance at the smooth, orange-red walls and it’s easy to see why. This canyon was formed by flash flooding and other subaerial processes that eroded the sandstone.
As the rains continue (in 2006, a flood lasted for more than 36 hours) the canyon’s landscape slowly forges on in its topical transformation. While scientists are unsure of when people discovered the cave, local Navajos claim that the surreal canyon has been part of their cultural heritage for ages.