The shoreline of Lake Mead. (While on our trip to Vegas, we took a brief plane ride over the Grand Canyon -- amazing! -- and snapped this photo.) The region is currently in a drought and the lake is way way down and so this stretch of shoreline is usually underwater. Which is partly why it looks so bleached, although, honestly, the area around the lake is pretty stark to begin with.
(fyi Earth From Above is also the name of a fairly amazing series of photos by Yann Arthus-Bertrand.)