Moving Rocks

Location: Death Valley National Park,USA (ni kat rumah Undertaker ni) 

The moving rocks, also known as sliding rocks or sailing stones, are a geological phenomenon found in Racetrack Playa, a seasonally dry lake (a playa) located in the PanamintMountains in Death Valley National Park, California. The rocks move across the surface of the playa, leaving long tracks behind them as they go, without human or animal intervention. They have never been seen or filmed in motion.

 Most of the moving stones originate from an 850 foot (260 m) high hillside made of dark dolomite on the south end of the playa, but some are intrusive igneous rock from adjacent slopes. Tracks are often tens to hundreds of feet (low to high tens of meters) long, a few to 12 inches (8 to 30 cm) wide, and typically less than an inch (2.5 cm) deep.