It might seem obscure - a water park in the middle of the dessert. Nevertheless, it is well worth it - the rides are amazing.
Wikipedia http://en.wikipedia.org/wiki/Knott's_Soak_City#Palm_Springs
Official Website http://www.soakcityps.com
Phone +1 760 327 0499
Address 1500 S Gene Autry Trail, Palm Springs, CA 92264, USA
Coordinates 33°48'14.568" N -116°29'33.825" E