Sinkhole

A sinkhole forms when underground rock is eroded away, and the ground above collapses, leaving a small or big hole in the ground

Sinkholes are weather-geology mixed disaster, making them quite unique. There are numerous famous sinkholes throughout the world, such as the National Corvette Museum Sinkhole, in Bowling Green, Kentucky, USA. Damage done by sinkholes varies drastically, and there are many variables, such as the size, weight, and density of the ground and structures, if pipes are leaking or not, amount of rainfall, and so on so fourth.Sinkholes have indeed killed people before. Sometimes it is from people falling and breaking bones, some people buried because the sinkholes was still forming, and some people even drowned because there is sometimes water at the bottom of a sinkhole. However there are signs that sinkhole might appear. These may include loosening soil, dying plants, and displaced objects.

Fun Facts
 * A sinkhole actually made the national corvette museum more popular
 * the largest sinkhole is in China
 * sinkholes can range in size from a few millimeters to hundreds of feet in diameter.
 * Common spots for sinkholes include the state of florida, the people's republic of china, and even the state of Kentucky.
 * one of the most unpopular natural disasters
 * can be caused by broken pipes