Call us geeks, but we love a good on-ramp. Bridges, too. When it comes to building the veins for our four-wheeled blood, mankind has crafted some pretty amazing stuff. Here's ten of our more mind-blowing efforts.

In J.G. Ballard's 1974 novel Concrete Island, a wealthy man becomes stranded (his Jaguar breaks down, natch) in a fenced-off section of highway overpass. He fills his days much as you'd expect –- he retreats into himself, meets people that don't exist, and generally turns into a raving nutbag.

Was the highway to blame for that guy's freak-out? Given that he was driving an old Jag, probably not. (Crusty Brit iron has been known to rot brains.) But if we were set to go crazy, these ten locations are where we would want it to happen. Nothin' says lost-mind lovin' like the elegant work of the civil engineer.

Photo Credit: Ken Ohyama / Flickr