Gray Line Chicago is part of a company that offers sightseeing tours in more than 150 destinations around the world and is, thus, experienced in the art of the guided bus tour. Choose from a long list of tours, which range from a few hours to an entire day of Chicago fun, from the Inside Chicago tour (you'll see the Loop, State Street, museums, yacht harbors and so much more) to the Blues By Night tour (first stop: Buddy Guy's Legends for dinner and the blues). Other Gray Line services include overnight packages, private charters, multi-lingual tours and custom group tours, too.