A flashback to penny arcades, the Musée Mécanique (museemecanique.com) houses a mind-blowing collection of vintage mechanical amusements. Sinister, freckle-faced Laughing Sal has freaked out kids for over a century, but don't let this manic mannequin deter you from the best arcade west of Coney Island. A quarter lets you start brawls in Wild West saloons, peep at belly dancers through a vintage Mutoscope and get hypnotized by a Ferris wheel made from toothpicks.