The world's largest implementation of this illusion can be found at The Haunted Mansion and Phantom Manor attractions at several Walt Disney Parks and Resorts. There, a -long scene features multiple Pepper's ghost effects, brought together in one scene. Guests travel along an elevated mezzanine, looking through a -tall pane of glass into an empty ballroom. Animatronic ghosts move in hidden black rooms beneath and above the mezzanine. A more advanced variation of the Pepper's Ghost effect is also used at The Twilight Zone Tower of Terror.