Charles Street is the name of a north-south street in the city center of Boston, Massachusetts. It begins in the north at Leverett Circle, where it intersects Cambridge Street and Storrow Drive, and gives its name to the Charles/MGH station of the MBTA. It then heads south and forms the primary commercial spine of the affluent neighborhood of Beacon Hill. At Beacon Street the direction of traffic changes from north-south to south-north, and the street widens to form the boundary between Boston Common and the Boston Public Garden. Beyond Boylston Street, which forms the southern boundary of the parks, the street continues as Charles Street South, terminating at Tremont Street in the Theatre District.