Hynes Convention Center is a light rail subway stop on the MBTA Green Line, located at the intersection of Newbury Street and Massachusetts Avenue at the west end of the Back Bay neighborhood of Boston, Massachusetts. It was opened by the Boston Elevated Railway (BERy) in 1914 as a transfer station between east-west streetcars running in the Boylston Street Subway to the Tremont Street Subway, and north-south streetcars on Mass Ave.