Over at Wizards of the Coast, artist Jason Thompson has been creating wonderful maps/posters that provide lovely illustrated walk-thrus of some of the classic Dungeons and Dragons modules of our youth. Above is my all-time favorite module, White Plume Mountain. There are plenty more at the site, and they are perfect for a geeky computer desktop, or to print out and hang on your wall.
[Found via Laughing Squid]