Over the Edge

Historical marker location:

Petrified Forest National Park, Arizona

( Marker can be reached from Petrified Forest Road, 2 miles north of U.S. Route 66 (Interstate 40), on the right when traveling north.)

Petrified Forest National Park.

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.