My whole life I have been fascinated by maps. I think it started when my parents gave me a globe and atlas while I was still in kindergarten. The National Atlas has such things as GIS layers of territorial acquisitions, election results, places, nighttime lights, etc..
Now if you are a total map freak (like me!), you will love a list of links to Anonometric maps. I'm still looking for a wall map of St. Louis that I like.