From China's Heavenly Pit, which stretches down 2,172 feet, to the Devil's Sinkhole in Texas that is home to three million bats -- here are some of the world's deepest known sinkholes.
From China's Heavenly Pit, which stretches down 2,172 feet, to the Devil's Sinkhole in Texas that is home to three million bats -- here are some of the world's deepest known sinkholes.
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