The Racetrack Playa is an expansive, ancient, (usually) dry lake bed best known for rocks that mysteriously move themselves, leaving only muddy tracks behind. But the playa is not always just an accumulation of cracked mud and magic rocks. On rare occasions it floods, and on windless days such as this the water on its surface becomes a mirror that just begs to be photographed. Note that on days such as this, one should not walk on the playa, as doing so will leave footprints that could last a generation.