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Weird and Mysterious Places on Earth
By siliconindia
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Saturday, 26 November 2011, 01:32 IST
Moaning Cavern:
The Moaning Cavern is a solutional cave located near Vallecito, California in the heart of the state’s Gold Country. It is developed in marble of the Calaveras Formation. It was discovered in modern times by gold miners in 1851, but it has long been known as an interesting geological feature by pre-historic people.
The sounds echoing through the cavern might be unnervingly like a human moan. But this sound is created by water dripping into holes in the bottom of the formation. This causes a drumming sound that echoes off the walls and is carried out of the Moaning Cavern’s natural entrance by the wind. Some of the oldest human remains known in America were found here.
