I have been to a few over the years-
Planes of Fame- Orange County Airport (long since closed)
San Diego Air and Space Museum
Chicago Museum of Science and Industry
Smithsonian Air and Space
Los Angeles Museum of Science and Industry
Ft DeRussy Museum Hawaii
Ft Benning Infantry Museum
Ft Polk Museum
Ft Irwin collection
Ft Lewis Museum
Deutsches Museum Munich
Dachau Barracks Museum/Memorial
Camp Chitose collection Hokkaido Japan
Camp Roberts Museum
Museum of Flight, Seattle
El Toro MCAS Museum (now closed)
March AFB Museum
McClellan AFB Museum
George Patton Memorial Museum, Desert Training Center
Chino Planes of Fame Museum
and while not really a museum per se, the Edward AFB open houses used to be like going to a museum.... incredible stuff there on display on the flight lines, in the hangers, and in the air...
Arizona Memorial- Pearl Harbor
US WWII Submarine Memorial, Seal Beach Naval Weapons Station