Fengjie County, in the Chongqing Municipality, is where you'll find Xiaozhai Tiankeng, the world's largest and deepest sinkhole — a gaping, enormous titan that extends an estimated 2,165 feet ...
The Xiaozhai Tiankeng sinkhole is vast. Probably formed centuries ago by collapsing caves and underground rivers, teams of explorers have sought to understand its many mysteries for years.
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