Photo of the Day 274

All-American Canal, Yuma, Arizona, 2003

Photograph by George Steinmetz

The All-American Canal disappears over the horizon of the Yuma, Arizona, desert. The 80-mile (129-kilometer) canal is part of an extensive system of waterways that taps the Colorado River to irrigate hundreds of thousands of acres of farmland in southeastern California and southwestern Arizona.

(Photo shot on assignment for, but not published in, "Watching You: The World of High-Tech Surveillance," November 2003, National Geographic magazine)