A must see... The Udvar-Hazy Center
/Wow, what a place! Two giant hangars house this massive display of aircraft. In my opinion equally enjoyable as the Center's older cousin, the Air and Space Museum in nearby D.C. Personal favorites: the diverse rotary wing display; Enola Gay (B-29 bomber); Space Shuttle; restored WWII German aircraft. Click the below link for more on the UHC:
Marine CH-46. Nice machine but I prefer it in navy haze grey