The Largest and Deepest Sinkhole in the World: Xiaozhai Tiankeng Fengjie China #historicaltidbits The Heavenly Pit, also known as Xiaozhai Tiankeng, is a breathtaking natural wonder located in China. This massive sinkhole, renowned as the deepest in the world, is a testament to the incredible power of geological forces. Formed over millions of years through the process of karst erosion, the Heavenly Pit is a result of the dissolution of limestone by water. This gradual process created a vast, ve