Havasu Falls, Grand Canyon, Supai, Arizona, United States

The falls are known for their natural pools, created by mineralization, although the configuration of the falls and the pools are damaged or destroyed repeatedly by large floods that wash through the area. A small man-made dam was once constructed to help restore the pools and to preserve what is left.
High calcium carbonate concentration in the water creates the vivid blue-green color and forms the natural travertine dams that occur in various places near the falls.
There are many picnic tables on the opposite side of the creek, and it is easy to cross over by following the edges of the pools. It is possible to swim behind the falls and enter a small rock shelter behind it.