I run a pathfinder campaign, and I make maps for it! I'm actually quite proud of this one. I use Maptools and populate it there. Of note is the big 'ol central chamber thing there. Those squares are cages filled with horrible abominations of nature! My players have no clue how close they came to opening up all those cages.

There's also a nice little lab to the east of that that the players ended up setting aflame in a huge explosion.