Marvin's Marvelous Mechanical Museum is in Farmington Hills, MI.
Every inch of Marvins Marvelous Mechanical Museum's 5500 square feet of floor space with 40 foot ceilings containing an array of buzzing and clattering new and vintage mechanical devices and oddities. Overhead dangle signs, animatronic dummies, over 50 airplane models gliding along a steel rail, vintage fans of all types, and classic sideshow posters. Marvin himself travels the world looking for odd coin operated devices, both new and old. Some of his machines are custom made just for him, and can not be seen in operation anywhere else. Marvin's is also listed in the World Almanac's 100 most unusual museums in the U.S.
Wikipedia: Marvin's Marvelous Mechanical Museum