The Chicago Loop is the central business district of Chicago, Illinois. It is known for its iconic skyline, featuring notable buildings like the Willis Tower and the Art Institute of Chicago. The area is bounded by the Chicago River and is a hub for commerce, culture, and transportation. The Loop is also famous for its elevated train system, known as the L, which provides easy access to various neighborhoods. Visitors can explore numerous attractions, including theaters, restaurants, and parks, making it a vibrant area for both locals and tourists alike.