National Museum of the Marine Corp
The National Museum of the Marine Corps is located near Quantico, about 35 minutes south of Washington DC. Opened in 2006, it honors the people how has served and is serving the United States. Besides a history of the service told through artifacts, uniforms, and exhibits, the museum contains a good collection of aircraft and a smaller collection of armored vehicles. The center piece however in my opinion are the life size dioramas with sound effects that you literally walk through. Definitely worth a visit if you are in the Washington DC Area.