House of Mystery

The House of Mystery exists as a location in the DC Universe simultaneously in Kentucky and in The Dreaming. The origins of the House of Mystery are unknown. In fact, very little is known about the House of Mystery in general. The architecture is indeterminate and changes periodically. The same holds true for the inside of the house: the rooms constantly shift, and one never enters the same room twice. The House of Mystery lies in the same graveyard as the House of Secrets, its companion. Whereas Abel resides in the House of Secrets, Cain makes the House of Mystery his abode.

The House of Mystery possesses sentience, along with mystic powers. It has possessed someone before, and merged with the House of Secrets briefly. This ties into the constantly shifting appearance of the House of Mystery. It was torn down in the metafictional The House of Mystery #321, but its existence was restored during the Crisis.

Trouble in London: The Miracle Dark Elite
The House of Mystery operates as the Miracle Dark Elite's base of operations. Skulduggery Pleasant recived the deed to the House of Mystery from Athena in used to upgrade an alliance. Maya Kumashiro has kept the deed for safe keeping in order to prevent anyone whom attempts to steal it.