This facility, clearly visible above the trees from several major highways, is located on a mountain called Lambs Knoll.
Speculation is that it is a hardened radio relay with a bunker under it. Built in the 60's and still manned by "men in blue jumpsuits."
Government - National - USA, Covert, Military - Communications
Links: fas.org
By: kjfitz
http://coldwar-c4i.net/Corkscrew/index.html
http://www.globalsecurity.org/wmd/facility/boonsboro.htm