"great" maps

After an hour of fruitless internet searching for "great" maps, I found one good resourch and was tipped off to another:
http://www.lib.utexas.edu/maps/
I've had fun searching through the Texas maps (bigger is better): http://www.lib.utexas.edu/maps/texas.html

Also (click on projects):
http://www.radicalcartography.net/