The Pima Air & Space Museum, located in Tucson, Arizona, is one of the world's largest non-government funded aerospace museums. The museum features a display of nearly 300 aircraft spread out over 80 acres (320,000 m²) on a campus occupying 127 acres (610,000 m²). It is also home since 1991 to the Arizona Aviation Hall of Fame.
The nearby Titan Missile Museum and Pima Air & Space Museum are over seen by the Arizona Aerospace Foundation and are governed by the Board of Trustees. They are non-profit 501 (c) 3 organization that relies on visitors paying admissions, for trams and AMARG tours, as well as what they spend in the Museum stores. Both Museums also rely on memberships and contracted events to pay to restore and acquire exhibits. It is located about 20 miles south of Tucson in Green Valley off of Interstate 19 and features a Titan IIintercontinental ballistic missile still in its silo. Tours of the above-ground and underground installations around the missile are conducted daily. More extensive "top to bottom" tours take up to five hours and are conducted several times each month. Reservations required for top to bottom tour.