Take a ride down an elevator 650’ below the surface of Hutchinson, Kan., and you’ll find endless miles of tunnels leading to active salt mines dating back over a century. “They mined out over 980 ...

In winter 1819, a natural entrance to a cave was found just south of Hannibal, Mo. Locals came from time to time to see the interesting place. One of those visitors in the early 1840s was a young ...

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