There were a number of Cold War facilities located in nearby states. See links above.
Federal Emergency Management Agency (FEMA) Regional Bunker - Maynard, MA
Mass. Emergency Management Agency (MEMA) Bunker - Framingham, MA
Montauk Air Station - New York
OTHR - Moscow, ME
Plum Island - New York
Sharpner's Pond ABM Site - Concord, MA
Stonybrook Air Station - Chicopee, MA
The Notch - Hadley, MA
Westover Air Force Base - Chicopee, MA
Misc. Non-CT photos: