There's also a Titan Missile Base turned into a museum
Also if you have time to head south to the Tucson area Kartchner Caverns is awesome. Very interesting history of how this whole huge unknown cave formation was found
https://en.m.wikipedia.org/wiki/Kartchner_Caverns_State_Park
Tombstone is worth a day especially if you like the movie/history
Bisbee has a really cool mine silver or copper or something