From WoW - Waycrest Manor in Drustvar, Kul Tiras. The entire region has fallen under the curse of the witches of the Heartsbane Coven, and the zone storyline culminates with a dungeon set inside the decaying mansion's walls.
The resemblance to Luigi's Mansion is not lost to the observant.
Yes, but is it Halloween approved? (asking for a friend).
Well...Belle would find that delightful...