I hope this is close enough to be a fence. It's of the interior of a bicycle/pedestrian bridge, called "Rattlesnake Bridge," over a major street leading into downtown Tucson, Arizona. On the outside, it looks like a rattlesnake. On the day I was there, I waited for about 30 minutes, hoping to include a bicycle or pedestrian in the photo, but nobody came by. It was built in 2002 and is iconic because it is so visible when driving below, but it is rarely used as a bridge.