Winchester Mystery House
The house was built by Sarah Winchester after her family had died. A spiritual medium convinced Sarah that the deaths in her family were part of a karma type curse on her that could only be satisfied by constantly building a labyrinthian mansion according to the wishes of the ghosts of the people killed by Winchester rifles. The result is a higgeldy-piggeldy four-story maze of rooms and corridors with staircases leading to ceilings, doors leading to 10-20ft/ 3-6m drops to the ground outside or the floor level directly below, windows between rooms and other crazy anomalies.