I first saw this idea at http://www.flourish.org/upsidedownmap/:

You can see a whole pile of these "upside down" maps there and learn about some "sideways" ones as well. Of course there's no reason why north has to be at the top all the time (unless you want to use the map to navigate, and even then it's likely you'll rotate the map nine ways to Sunday, the issue is just in which rotation the words are right side up.)

I found a page that sells a variety of maps... I think I want a lot of these ones

Kate