The residents of Tucson enjoy the singular experience of walking and bicycling though the innards of a 280 feet long diamondback rattlesnake. The snake is a pedestrian bridge over Broadway Boulevard, built as a high concept art project with public art funding (if you're fixing infrastructure, you might as well make it something weird or fun to look at).
The design concept came from Tucson artist Simon Donovan in 1997, was completed in 2002, and has subsequently won several design awards.
The snake's eyes light up at night. The tail contains a motion sensor that triggers an amplified rattling sound -- perfect to startle speeding bicyclists.
When we visited, the rattler must have been on the blink. It didn't seem heavily trafficked -- we were the only ones on it for 20 minutes in early evening. It also seemed to lead from one non-essential part of town to another, but maybe we just missed the mad rattler commute...