You should have asked me about two years ago.
I was working on a rpg/capture the flag map. (RPG if one player, ctf if multiplayr.) It was in installation, and it had some pretty awesome rooms. Plus it was probably one of the only maps that had 256 combinations of randomness triggers. (7 switches on random took a while to make on regular editor) Well, I remember having a big room with lots of small nooks and crannies in it, with mines randomly layed about was pretty entertaining. The only problem, now, is that it was on my old mac, which burned when our house burned down a while back.