14th Annual Smithsonian.com Photo Contest
Sunrise at Signal Hill
Here is a picture of a petroglyph from the prehistoric Hohokam people. This petroglyph is one of many on top of Signal Hill, just outside Tucson, AZ and next to Saguaro National Park West.
© Bryan DeJonghe.
All rights reserved.
||Nov. 15, 2016, 5:23 p.m.