Ahahaha. Well, it may be a month or so yet before I get myself any of the DVDs. So you do have time to figure out which ones they are.
There are regions based off of the geography of Berlin, San Francisco, London, and New York, as well as a couple regions that don't have a real world location. I'm building in one of those that doesn't have a real location. I don't really have the patience to terraform, but I've done a bit of it myself before.