White Pocket is in a remote section of Vermilion Cliffs National Monument in Arizona. Home to extraordinary sandstone formations, it is popular with photographers intrepid enough to explore it. Under a deep blue sky, the red and white swirls form an amazing contrast, and if you get lucky enough to find a puddle after a rainstorm, you might get a picture of a lifetime. Photo by Jessica Fridrich. Posted on Tumblr by the US Department of the Interior, 6/6/16.