Boullée in North Dakota

- - image via Library of Congress from pruned.blogspot.com

- - image via Library of Congress from pruned.blogspot.com
From the HABS/HAER collections in the Library of Congress comes these gorgeous photographic documentations of an anti-ballistic missile complex in North Dakota.
Several such sites were planned as part of the Safeguard Program, but only this was ever completed. And after being in operations for just 4 months, it was deactivated.
– from pruned.blogspot.com
Link via we-make-money-not-art.com

Necron monolith anybody?
@Distepheno
Ha! That was my first thought, too.