Our Pick
Posted on @rawstates
The Casselman Bridge
1813
Garrett County, Maryland
Public domain · Wikimedia Commons
An eighty-foot stone arch on the National Road, the largest in America when built, and so improbable that its builder is said to have waited under it when the falsework came out. It was the first federally funded highway, and the country's argument about who pays for roads starts with it.
That was 1 of the hidden places.
Location: documented spot
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