Tremont Street Subway served a light rail station on the MBTA Green Line system, and is located on the southeast corner of Boston Common at the intersection of Boylston Street and Tremont Street.
The western Public Garden portal was replaced in 1914 with two portals, one in the middle of Boylston Street adjacent to the old portal, and the other at the west end of the Boylston Street subway, just east of Kenmore Square
  The Boylston Street portal was sealed in 1941 when the Huntington Avenue subway was opened (with a new portal at Northeastern University)

