I anyone is a Bioshock fan like I am, then you will really enjoy this video. A PA server recreated Rapture, with all the main areas, and then some. It's incredibly impressive, especially since it's all actually underwater and they gathered all the materials with no spawning/modding.
http://www.youtube.com/watch?v=MNxcxnKYPOc
http://www.youtube.com/watch?v=MNxcxnKYPOc