This is one of those hidden little gems that most people in Milwaukee don't even know about. Nestled on the campus of the Milwaukee School of Engineering, the Grohmann features 1300 works of art spanning 400 years. It offers visitors three floors of gorgeous gallery space featuring pieces that reflect the history of people at work. The rooftop sculpture garden is the money shot with dozens of larger than life bronze statues juxtaposed against the ever expanding Milwaukee skyline.