Housed in the only remaining building from the 1893 World's Fair, Griffin MSI is a Chicago must-see. When visiting the largest science museum in the Western Hemisphere, you'll experience a 40-foot tornado, climb aboard a World War II German submarine, take a run in a human-sized hamster wheel, descend into an Illinois coal mine, board a 727 hanging from the ceiling and much more! Griffin MSI is not a place where you walk around quietly and observe. You get involved in the fun — and learn — by doing. Just a few miles from city centre with convenient underground parking. Children under three years of age receive free admission to the Museum.