Frieght train passing through tunnel
This westbound freight train, snaking along the Colorado River in Gore Canyon, passes through Tunnel 39. (I had previously posted this photo for Tunnel 42, but that was not the tunnel in this photo, so I moved it here.)
Photo taken by Roger Deschner in July 2011
License: Creative Commons Attribution-Share-Alike (CC BY-SA)
BH Photo #387943