http://maps.nationalgeographic.com/

http://maps.nationalgeographic.com/map-machine

http://www.worldmapper.org/

http://lib.utexas.edu/maps/

http://www.multimap.com/

http://www.amadeus.net/home/subwaymaps/en/index.htm

http://maps.google.com/support/bin/answer.py?hl=en&answer=68480

http://web-japan.org/region/

http://cmap.ihmc.us/

http://www.glest.org/files/contrib/maps/