Historical Marker
Ajo Train Depot
Historical marker location:
1 W Plaza St, Ajo, Arizona
( Marker is on West Plaza Street north of Plaza, on the right when traveling north.)
The world's largest solar telescope is located in Arizona: The Daniel K. Inouye Solar Telescope, located on the summit of Haleakala in Maui, Hawaii, is the largest solar telescope in the world. However, the next largest solar telescope, the McMath-Pierce Solar Telescope, is located at the Kitt Peak National Observatory in Arizona.