Find prehistoric petroglyphs
Head west of Tucson to find petroglyphs on a cliff at the Picture Rocks Retreat and atop Signal Hill in Saguaro National Park.
As featured on
Saguaro, cholla and prickly pair damaged; culprits sought.
Will be upgraded, given hardened surface.
Saguaro Park's Darla Sidles will become superintendent of Rocky Mountain National Park.
