With more than 82 miles of mapped passages, Wind Cave, located in South Dakota, contains the world's largest display of a rare formation called boxwork.
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Bowdle is known for the tallest water tower in South Dakota.
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Jack McCall was tried, convicted and hanged two miles north of Yankton, South Dakota in 1877 for the shooting of Wild Bill Hickok. He is buried in an unmarked grave in the Yankton cemetery.