1. 
   Racetrack Playa
   (from the article `Death Valley`) ...high Eureka Sand Dunes, California`s tallest. The northern section of the park is dotted with volcanic craters such as Ubehebe Crater, 700 feet ...
   Found op http://www.britannica.com/eb/a-z/r/2
   
   
2. 
   Racetrack Playa
   The Racetrack Playa, or The Racetrack, is a scenic dry lake feature with "sailing stones" that leave linear "racetrack" imprints. It is located above the northwestern side of Death Valley, in Death Valley National Park, Inyo County, California, U.S.. ==Geography== The Racetrack Playa is 3608 feet (...
   Found op http://en.wikipedia.org/wiki/Racetrack_Playa
   
   

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