Impossible Canyons

Historical marker location:

Marble Canyon, Arizona

( Marker is on U.S. 89A at milepost 538.3, on the right when traveling west.)

Marker installed: 1976

Dominguez y Escalante Expedition 1776-1976.

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.