I'm cleaning out my favorites and stumbled upon this: http://1.bp.blogspot.com/_SyX2UiN9b7w/TA6O1NWUt2I/AAAAAAAAAl0/ot_4ymSgK08/s1600/texas.jpg
This looks like it was written in the '40s for a children's joke book; but the notion that non-traveling Texans can't visualize anything between us and Canada is completely apt. Ironically enough I think most of us know the Gulf Coast and lower-to-mid-Atlantic blindfolded.