From the Back of the Box:
Dungeon building has just become easier!
This box contains 24 sheets of fold-up dungeon rooms, compatible with any role-playing game or miniatures scenario. More than 40 predesigned rooms and many cardboard and paper decorations for adding a personalized touch to the rooms are inside this box. Assembly is simple because the pieces are diecut and prescored: only glue is needed. Also included are three two-sided color mapsheets with dungeon layouts and underground terrains to situate the dungeon rooms.
In addition, a 64-page booklet contains instructions for building and using the fold-ups, plus numerous tips on dungeon design. Dungeons of Mystery describes how to create realistic and exciting dungeons and provides the tools to make the dungeon come alive. The booklet also holds sample adventures, new magic, and new monsters.
Dungeons of Mystery is fully compatible with Cities of Mystery, Castles, Strongholds and other TSR, Inc. three-dimensional products.