1001 Doors

Publisher's blurb: These 1001 Dangerous Doors make dungeon doors much more than mere obstructions between one place and another; they can be as much a part of the ambiance as any dungeon decor, and as much a part of the opposition as a monster.This collection is particularly useful for dungeon and adventure area design. Just picking ten entries off the list and assigning them to ten doors on your map can spark your imagination and really make a dungeon interesting.