Park Street Station of the MBTA, located at the intersection of Park Street and Tremont Street in Boston at a corner of Boston Common by Brewer Fountain, is the main transfer point between the Green Line and the Red Line. Throughout the green and red lines, trains labeled "inbound" are headed towards this station, Downtown Crossing, or Government Center while those labeled "outbound" are headed away. Along with Downtown Crossing, Government Center and the State Street station, Park Street forms one of the four "hub" stations of the MBTA's subways, where the four subway lines of the MBTA cross each other in central Boston.