Travel + Leisure on MSN
America’s Largest Underground Lake Is Hidden 140 Feet Below the Surface—Here’s How to Visit
You can even take a boat across the Lost Sea, deep in Tennessee’s Craighead Caverns cave system.
James is a published author with multiple pop-history and science books to his name. He specializes in history, space, strange science, and anything out of the ordinary.View full profile James is a ...
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