The Chicago Loop is the central business district of Chicago, located in the heart of the city's downtown area. It is bordered by the Chicago River to the north and west, Lake Michigan to the east, and Roosevelt Road to the south. The Loop is known for its iconic skyscrapers, including the Willis Tower (formerly known as the Sears Tower) and the John Hancock Center, as well as its bustling streets filled with shops, restaurants, and cultural attractions. The Loop is also home to many of Chicago's most famous landmarks, such as Millennium Park, the Art Institute of Chicago, and the Chicago Cultural Center. The area is a hub for commerce, with numerous office buildings and corporate headquarters, as well as a vibrant nightlife scene with theaters, music venues, and bars.