I'm highly surprised nobody has mentioned the Sunshine Skyway Bridge over Tampa Bay in Florida (or maybe I missed it). Anyhoo, when I first saw it around Christmas 1989, there were still remnants of the original bridge (replaced because of a tanker vs. bridge collision in 1980 that killed about 35 people), so it was kind of, well, weird seeing the original-it probably would have scared me more than the current bridge might. Some of those remnants have been refashioned into fishing piers. You can see pictures of old next to new in Wikipedia.