Jason Engle and a music map
No, the two don't have much in common, apart from me finding these maps the last few days ;). I liked them so much, I thought it would be good to share :)
Jason Engle is an artist, who has done work for Wizards of the Coast, several other (roleplaying) publishers, covers for novels. And, as I found out, also some cartography. There are several pages of overland maps, building maps and encounter maps, all rich in colour and detail.
Another map I found today was a map, set up as some sort of metro system, depicting the artists musical styles and bands. I liked the concept in itself a lot, and the result is also very nice :)