Art Institute Chicago
111 S. Michigan Ave., The Loop
Founded in 1879, the Art Institute of Chicago is hands down one of the city’s oldest treasures. The permanent collection is 300,000-strong, boasting such American classics as Grant Wood's American Gothic and Edward Hopper’s Nighthawks. If you haven’t been in a while, it’s worth a visit just to see the recently opened, Renzo Piano-designed Modern Wing. Piano is famous for his lighting, and the shelter above the space (which allows some daylight to sift into the galleries) is one of the best examples of his work to date.