Color view of railway cars on a bridge at Canon Diablo in the Grand Canyon, Arizona, 1900-1940

Photograph of a color view of railway cars on a bridge at Canon Diablo in the Grand Canyon, Arizona, 1900-1940. At center a long line of dark railway cars span across a long bridge which connects two plateaus at left and right. The bridge is held up by long metal poles which extend from the bottom of a canyon. A blue river can be seen running down the center of the canyon towards the background, while the rock is depicted in shades of red, brown, and tan