I'll toss another vote in for the Air Force museum at Wright Patterson. Anyone has hasn't paid it a visit, should do so. Even my wife, who isn't a machine buff, loved it!
Another vote here. I went several years ago when a friend rented a Cessna for a fly-in at WPAFB. Let me tell ya, going from Atlanta to Dayton for a quick day trip is a good argument in favor of getting a pilot's license.
The hangars are enormous. Any structure that dwarfs a B-52 is pretty impressive all by itself.
Also they have a B-52 there and when you read its history (Vietnam) you get chills. She is a battlescarred veteran.
The Enola Gay is out at the Smithsonian Museum extension at Dulles and it is worth the trip just to see her. She is a beautiful old darling; looks ready to go.
Japanese tourists always pause to look at her....hard to know what they are thinking.
Regards,