Currently I'm working on a really BIG dungeon for the kids to go through. Table one is their "entry" level and it will measure roughly 3x4 feet. The main level will be 8x4 feet with multi-colored tiles (colored keys to open the colored rooms are hidden). Somewhat 3-d as well as the main room requires five colored keys and sits 10 inches above everything else.
Once I finished designing it and laying it out I'll do photos and post along with the other dungeons I've done including the magical sawmill building.