Anyone been watching Pan's Labyrinth ?
When Ofelia tries to complete the second task, she has to go through lair of Pale Man, a child-eating monster. It has really interesting architecture, color, shape, material... I though it really fits the style of DR:

It doesnt show well, that there are also smaller corridors going side by side with the middle, wiger one, separated only by collumns. Too bad there is no better image, but it is really worth to watch the movie, so besides having fun there is a chance to see what i mean :)
Pale Man beast is scarry too, I wouldn't want something like that to catch me in DR ;o