- 'Very Large Array' Radio Telescope, New Mexico
https://en.wikipedia.org/wiki/Karl_G._Jansky_Very_Large_Array - 'Spaceport America', New Mexico
https://en.wikipedia.org/wiki/Spaceport_America - Saguaro National Park, near Tucson
- A remnant of the old 'Plank Road' in far-southern California...
A wooden road that crossed the Imperial Sand Dunes from 1914-1927. http://www.blm.gov/ca/st/en/fo/elcentro/arch_cult/plankrd.html - Saguaro National Park, near Tucson
- 'Very Large Array' Radio Telescope, New Mexico
https://en.wikipedia.org/wiki/Karl_G._Jansky_Very_Large_Array - Diamondback Pedestrian/Bike Bridge, Tucson
http://www.atlasobscura.com/places/diamondback-bridge - Mission San Xavier del Bac, near Tucson
https://en.wikipedia.org/wiki/Mission_San_Xavier_del_Bac - Painted Rock Petroglyphs, Arizona
https://en.wikipedia.org/wiki/Painted_Rock_Petroglyph_Site - ...Just 1/3 mile from the US-Mexico border fence!
- Titan II Missile Museum, south of Tucson
https://en.wikipedia.org/wiki/Titan_Missile_Museum - Kitt Peak National Observatory, southwest of Tucson
- Mission San Xavier del Bac, near Tucson
https://en.wikipedia.org/wiki/Mission_San_Xavier_del_Bac - 'Very Large Array' Radio Telescope, New Mexico
https://en.wikipedia.org/wiki/Karl_G._Jansky_Very_Large_Array - At the 'Trinity Site', New Mexico, where the first atom bomb was tested in July 1945.
https://en.wikipedia.org/wiki/Trinity_%28nuclear_test%29