On the very slight chance that you haven't seen this guy's work, you really should give him a visit. Dyson does the coolest dungeon geomorphs. I recommend them — and him — most highly.
He pumps out a new tile every day or so (usually) and colllates them into weekly sets like the ones to left and right.
To be completely honest, I can't say that I've made any real use of them myself as yet. But the idea of a geomorphic tile-based dungeon appeals to me as a planning aid, and I really should get my act together to print them out on card and start shuffling.