Our Pick
Posted on @rawstates
Congress Plaza Hotel
1893
South Michigan Avenue, Chicago
IvoShandor · CC BY-SA 3.0 · Wikimedia Commons
Built for the World's Columbian Exposition and the site of the longest hotel strike in American history, from 2003 to 2013. Its sealed rooms and long decline have made it a fixture of the city's ghost tours.
That was 1 of the hidden places.
Location: documented spot
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