If you're looking for a furnished dungeon, the Table of Many Tables may be of help...
1. Traditional single level dungeon. 12 cells, 2 oubliettes, 26 stocks, miles of chains.
2. Perfect starter dungeon for a minor noble or abbot. 4 cells, torture chamber, spare pit, plenty of room for expansion.
3. Deluxe multi-level dungeon. 200 cells, gladitorial training center, spacious guard quarters, fully stocked armory, central air.
4. Bizarre dungeon. Unexplored levels, multiple interdimensional nexus points, haunted, well-appointed.