This is an interesting building onthe edge of Fort Meade. It is very secure but flipping to map mode it looks like it isn't actually on Fort Meade like the rest of the NSA Complex.
Map mode says it is on Joseph H Ream Road and Ream was once a director of NSA so I assume it is an NSA site.
BIG airconditioning in back. Perhaps this is a data processing center. The front entrance is fairly fancy. Small parking lot.