Sinkhole??? It is just what it sounds like, a natural depression or hole in the surface topography caused by the removal of soil or bedrock, often both, by water. The size and depth of some sinkholes is astounding, from several hundred meters deep to over 100 km across. The giant sinkholes of Earth belong to the most impressive natural landmarks. They can form slowly or instantly, making them all the more intimidating. Here are 10 of the most amazing sinkholes across the world.
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