Our Pick
Posted on @rawstates
Florida Caverns
1942
Marianna, Florida
Bruin79 · CC BY-SA 4.0 · Wikimedia Commons
Nearly all of Florida's caves are underwater. These are not, and they are the only air-filled ones the public can walk through in a state park, rooms of flowstone and columns that the Civilian Conservation Corps opened up by hand in the 1930s, digging connecting passages with picks so a tour could pass.
That was 1 of the hidden places.
Location: historic site
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