There are two Dungeons:

YOUR DUNGEON...
...is in your mind. It is a large space, filled with a mass of devices designed
to imprison and torture you. There are some, whose purpose you can only guess
at. Its dark walls absorb the rattle of chains, the whistle of the whip, and your cries of pain.

MY DUNGEON...
...is in London's Bayswater. Otherwise it fits the same description as yours.