Just today I learned about an interesting proposal for the old Riverside-Figueroa Bridge. It was slated to be demolished following the completion of a new bridge, but some people think it could be redesigned to create a public space. Sounds like a good idea to me. If you want to learn more, click on the link below.
The photo above was taken by Osceola Refetoff, and I found it at the LA Creek Freak blog. The author gives an exhaustive history of this bridge, which you can access by clicking here.