All of the museums mentioned in this forum are good. Some others are:
1. Museum of Aviation, Warner-Robbins, Georgia, (south of Macon). They have SR-71, U-2C, B-52, B-29, C-124, C-130, C-121, B-25, B-26, Mig 17 and many others. Beautiful place, big enough to be very interesting and small enough to see in 1/2 day.
2. USAF Armament Museum, Fort Walton Beach, Fl. They have examples of most bombs and other things that go bang as well as SR-71, B-52, B-25, B-47, P-47, P-51, and many more. The front sign is mounted on a 44,000 lb iron bomb. Talk about the "big bang" theory.
3. Museum of the Cosmos, Liberal, Kansas. They have SR-71, other planes and much space related stuff, including Gemini and Apollo capsules.
4. Kalamazoo Air Museum, Michigan. They have SR-71B (they only one), and many WW-II fighters and Korean war jets. Grumman Iron works represented by F-4F Wildcat, F6F Hellcat, F7F Tigercat, F8F Bearcat, F9F Panther and F9F Couger.
5. Battleship Alabama Museum, Mobile, AL. They have the USS Alabama, submarine USS Drum, A-12 (early version of SR-71), prototype F-105B, P-51, FG-1 Corsair, B-25, H-21, UH-1, F-86D, HU-16, Russian T-55 tank, etc
6. March AFB Museum, Riverside, California. They have SR-71, B-52, U-2C, B-47, B-25, HU-16, F-101, F-100, and many more.
7. Castle AFB Museum, Merced, California. They have SR-71, B-36 (1 of 4 in existence) B-52, B-47, B-25 and many more.
8. San Diego Naval Aviation Museum, Balboa Park, California. They have A-12, Ryan NYP replica, Mig 17, F-4 Phantom, PBY Catalina and many other Navy and AF planes.
9. Travis AFB Museum, Fairfield, Calfornia. They have examples of most of the cargo planes flown by the USAF since WW-II
10. USS Intrepid Museum, WW-II aircraft carrier in New York City with about a dozen planes on her deck including an A-12, RA-5C, FJ4 Fury, F9F Panther