The Pima Air & Space Museum in Tucson, Arizona, is the world’s largest non-government funded aerospace museum. The museum is adjacent to the Davis-Monthan Air Force Base. The Aerospace Maintenance and Regeneration Group, affiliated with Davis Monthan AFB, also known as the fabled Graveyard of Planes or The Boneyard, is one of the largest aircraft storage and preservation facilities in the world, http://en.wikipedia.org/wiki/Pima_Air_%26_Space_Museum The Pima Air & Space Museum offers exclusive bus tours of the 309th Aerospace Maintenance and Regeneration Center (AMARG), also known as the "Boneyard." The facility is located adjacent to the Museum at Davis-Monthan Air Force Base. Seats are avaliable on a "first come first serve" basis, http://www.pimaair.org/view.php?pg=16