I said, my plan is to create an overhead view of a town map. So that's one option. You could also create a regional/world map, a cavern map, or any kind of map, including an old school dungeon map. The point is open your mind a bit, escape the obvious. So if making a dungeon map seems too obvious for your perfect B/W challenge map, then break your idea mold and attempt something outside that mind set. Think of a map that you'd normally do in full color that is not a dungeon map, then do it in B/W only to comply to the challenge requirements.

I personally don't care for old school dungeon maps - so that wasn't the obvious B/W project in my eyes.

GP