carried present-day Washington Street, formerly flanked by tidal marshes. The South End is south of the
Back Bay, northwest of
South Boston, northeast of
Roxbury, north of
Dorchester, and southwest of
Bay Village. Despite the name, it is not directly south of downtown Boston. Land belonging to the South End has been part of the city of Boston since its founding, although it was smaller when first settled and surrounded by large
tidal flats. The neighborhood was expanded and developed by filling in the marshlands, part of a larger project of filling Boston's Back Bay and
South Bay between the 1830s and the 1870s. Groundwater levels in Boston had been dropping for years by 2006, damaging some wood pilings by exposing them to air. A series of
monitoring wells have been drilled; the water level is checked by the Boston Groundwater Trust, and can be raised by introducing water. which terminated at the B&PRR station bordering the Public Garden. The rail line is now covered by
Southwest Corridor Park. The primary business thoroughfares in the South End are
Columbus Avenue,
Tremont Street, and
Washington Street. Washington Street, the original causeway that connected Roxbury to Boston, experienced reinvestment during the 1990s. The street was once defined by the
Washington Street Elevated, an elevated train that was moved below Southwest Corridor Park in the 1980s. Part of the
Silver Line, Boston's first
bus rapid transit line, runs along Washington Street. The
MBTA Orange Line rapid-transit train runs along the partially-covered
Southwest Corridor. •
SoWa (South of Washington), roughly between Albany to Washington and East Berkeley to
Massachusetts Avenue • New York Streets, between Herald, East Berkeley, Albany, and Tremont Streets • Back Streets, roughly between I-93, Harrison, East Brookline, and East Berkeley Streets • Medical area, roughly between the highway, Massachusetts Avenue, Franklin Square, and East Brookline Street
Historic district Part of the neighborhood is on a
National Register of Historic Places district, which is bounded roughly by the
Southwest Corridor Park on the northwest, the
Massachusetts Turnpike to the north, Herald Street to the east, Albany Street to the south east, and
Massachusetts Avenue to the southwest. The area's principal development took place 1850–1873, and resulted in a neighborhood of what were originally single-family brick or brownstone rowhouses, interspersed with retail and civic buildings, as well as six small parks. After the
Panic of 1873, these properties were for the most part converted to multi-unit housing. The district was listed on the
National Register of Historic Places in 1973. In 2014, it was expanded to include additional properties on the 200 block of Harrison Street, and it was further enlarged in 2025. ==Parks==