James J. Hill House, St Paul

Once the home of railroad baron, James J. Hill, the Minnesota Historical Society now owns this mansion. Tours provide a glimpse into what astonishing wealth could buy at the turn of the 19th century. It contains 42 rooms including 13 bathrooms, 22 fireplaces and a 100-foot reception hall. Stained glass windows, an enormous pipe organ and intricately carved woodwork are just a few of the highlights. The two-story art gallery is worth the price of admission alone. Tours depart every half-hour.