The Loop oozes with charm and culture—it has a world-class symphony, top-rate theaters, fine restaurants, tempting shops, and swinging nightlife. There’s no shortage of sights to see either. A slew of impressive buildings representing different styles and eras makes it feel like a theme park for architecture enthusiasts. (You won’t be able to go inside every architecturally notable building, but where you can, we explain what to look for in the interiors as well.) Internationally known landmarks, including Millennium Park's Cloud Gate sculpture, blanket the Loop landscape, and visitors and locals alike gush over the masterpieces displayed inside the renowned Art Institute, this country's second-largest art museum.