Our Pick
Posted on @rawstates
Granite Mountain Records Vault
1963
Little Cottonwood Canyon, Utah
Public domain · Wikimedia Commons
Tunnels driven 600 feet into a granite mountain hold billions of images of the world's parish and civil records, kept at constant humidity behind fourteen-ton doors. It is the largest genealogical archive anywhere, and much of it is now online.
That was 1 of the hidden places.
Location: documented spot
This place has its own thread on r/rawstates
Read what people are saying about it, or add your own.