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On April 27th, a large sinkhole began opening in Black Hawk, South Dakota. About a dozen nearby houses were evacuated, and its residents left confused. Now, a caving group called Paha Sapa Grotto is finally taking a look inside…
On April 27th, a large sinkhole began opening in Black Hawk, South Dakota. About a dozen nearby houses were evacuated, and its residents left confused. Now, a caving group called Paha Sapa Grotto is finally taking a look inside…
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