How it works - Zip Code edition

Well, it's not really a lesson on "how" it works but just kinda shows how it works.  Once you try it you'll understand.  Anyway, follow the link and start typing in a zip code.  It's an interactive map that shows what sections of the U.S. are broken down by the numbers in the zip code and it keeps zooming in to state, then city, then town and so on.  It's pretty cool!

[Zip Decode by Ben Fry]