Racetrack Playa
The Racetrack Playa in Death Valley National Park is a fascinating place. It's a 27 mile winding and washboarded road to the Playa, a dry, flat lakebed that has water only a few days a year. The reward for the effort of getting there is the viewing of a strange geologic phenomenon not seen anywhere else on earth: Sailing Stones.
Although no one has witnessed it, these rocks really move. It's tough to explain this, so check out this article for more information.
To give a sense of scale, the rocks are about basketball size.
These last images are of the Grandstand, a large volcanic (igneous) outcropping rising dramatically from the flat lakebed:
