The crown jewel of Chicago's art world, the Art Institute holds the second largest collection of fine art in the country. Though the museum is known for its collection of impressionist and post-impressionist works (don't miss the permanent Pritzker Galleries), the Renzo Piano-designed Modern Wing, which opened in 2009, is an experience in itself. With its vast collection of modern art by Picasso, Matisse, Ellsworth Kelly, Willem de Kooning and Gerhard Richter, its rotating exhibits showcase some of the world's most progressive and groundbreaking modern art, architecture, sculpture and photography. When all the browsing has made you peckish, visit Terzo Piano, award-winning chef Tony Mantuano's gorgeous Italian restaurant offering views of Millennium Park and the Chicago Skyline. Or grab a quick coffee and pastry at Cafe Moderno and marvel at the museum's Griffin Court's minimalist beauty.