Tremont Street Subway served a station on the MBTA subway system, located at the intersection of Park Street and Tremont Street under Boston Common in downtown Boston.
Boston Common ( also known as the Common ) is a central public park in downtown Boston , Massachusetts . Park Street is a station on the MBTA subway system , located at the intersection of Park Street and Tremont Street under Boston Common in downtown Boston . Tremont Street Subway . The tunnel originally served five closely spaced stations : Boylston , Park Street , Scollay Square , Adams Square , and Haymarket , with branches to the Public Garden Portal and Pleasant Street Incline south of Boylston .