IVhorseman wrote:something you could explore is the "blind labyrinth" idea.
basically, build a maze all well and good, and then once you're done, build a layer of briks, plates etc. on top of the maze to cover it up completely, blocking it from sight of the players.
start minifigs out in any entrance point, and remove the cover that you built over it every time minifigs get near, to simulate the exploration of an unknown cave/maze. you could go from that and say that minifigs can see a certain set number of inches away to remove briks.
This is really fun, makes for interesting surprises...