Take I-19 south of Tucson to the Duval Mine Road Exit, turn right, west, watch for signs. For my fellow SAC USAF alma mater, this is a must see. Check the web page to find the Top to Bottom of the silo tour. The Cold War Veterans will be reminded of a time forgotten, Remember comrades, WE WON that war!!
The Pima Air Museum operates this site. Former military veterans of all branches will be thoroughly impressed at the Pima Air Museum. I go at least twice per year and find something I never noticed on previous visits. Try the Tucson Street Rods Pima Air Museum June car shows in the hangars, Cool. Photo below of our 1977 FIAT 124 Spider in front of the XR71 spy plane, which is now housed in a hangar.