User blog comment:D.Ryan/New York City and Rapture/@comment-2250991-20110628061907

As said, a lot of Rapture is a combination of Art Deco and popular metropolitan landmarks, especially around NY, Chicago, Miami, and mostly around the world. Even this comparison of Metropolis shows some inspiration for Rapture's look:

http://popularsymbolism.files.wordpress.com/2008/11/rapture-metropolis-big.jpg

If you Google search "Art Deco Buildings", you'll find a lot of buildings that look like they're from Rapture. Or it'll be easier to go on this scale model site, which their replicas are based on a lot of landmark buildings:

http://www.replicabuildings.com/products.php?cat=20

Even their chess set looks like it's Rapture:

http://www.replicabuildings.com/proddetail.php?prod=482&cat=20