2. Oversea Highway

Location: Florida Keys
Known For: Unique roadway spanning the Keys
Complex Says: For a completely man-made system of 43 bridges that was originally conceived in 1938, the Overseas Highway sure has held up over time. You aren't going to find another highway like it, both in terms of traveling and scenery. Plus, it's in the Florida Keys. It's romantic enough that it figures heavily in a Beach Boys song. That should count for something.