10. SAC Museum, Ashland, Nebraska

1414 145 miles from the Center of the USA
This museum for the Strategic Air Command opened in 1998, and is one of the largest military museums in the world. The original museum, conceived by SAC commander and Pentagon-builder General Curtis LeMay, opened in 1959, on the grounds of the SAC headquarters at Offutt Air Force Base, located 20 miles to the east–a strategic location at the middle of the country. Security and space issues there led to a drive to build a new museum off-site. For much of the Cold War, SAC was the military agency responsible for deploying the nation’s nuclear arsenal against the enemy. The 300,000 square foot museum and education center contains numerous aircraft, including an SR-71, as well as fixed and traveling exhibits. It is now called the Strategic Air and Space Museum, reflecting a change in the museum, away from its origins.