Located just west of Tokyo at the foot of Mt. Takao, the Takao Trick Art Museum opened in 1996, and is dedicated to the art of the optical illusion. Essentially, it's a markedly more sophisticated and considerably less carnie-filled version of a carnival fun house, boasting a number of "galleries" decked out with mind-bending murals designed to mess with your eyes. Many of the exhibits feature "trompe l'oeil," a.k.a. two-dimensional paintings intended to deceive the eye into thinking they're three-dimensional.