Our Pick
Posted on @rawstates
First controlled nuclear chain reaction
December 2, 1942
Stagg Field, University of Chicago
Enrico Fermi's Chicago Pile-1 went critical under the west stands of Stagg Field on December 2, 1942, the first controlled, self-sustaining nuclear reaction.
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.