Chicago Union Station is an intercity and commuter rail terminal located in the West Loop Gate neighborhood of Chicago, Illinois. The station is Amtrak's flagship station in the Midwest. While serving long-distance passenger trains, it is also the downtown terminus for six Metra commuter lines. The station is just west of the Chicago River between West Adams Street and West Jackson Boulevard, adjacent to the Chicago Loop. Including approach and storage tracks, it covers about nine and a half city blocks (mostly underground, buried beneath streets and skyscrapers).