Our Pick
Posted on @rawstates
Falls of the Ohio and the founding
1778
Ohio River at Louisville, Kentucky
Chris Light · CC BY-SA 4.0 · Wikimedia Commons
The only natural barrier on the whole Ohio River forced boats to unload here, and a town grew on the portage. The rapids also exposed a 390-million-year-old fossil coral reef, among the largest anywhere.
That was 1 of the hidden places.
Location: historic site
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