MetroWest region. Several plazas and chain stores are located along the route as it makes its way towards Northborough, where it crosses U.S. Route 20; Westborough, where it crosses Interstate 495; and eventually in the Golden Triangle retail area of Framingham and Natick, after crossing the Massachusetts Turnpike. It passes Shopper's World and the Natick Mall, New England's largest mall. Beginning in the Golden Triangle, Route 9 becomes one of the major routes into Boston, serving as a valuable bypass to the Mass Pike and its tolls. It crosses Interstate 95 (also known as Massachusetts Route 128) in Wellesley before crossing the Charles River into Newton and Brookline as Boylston Street. It enters the city of Boston by crossing over Brookline's former namesake, the Muddy River, part of the Emerald Necklace. At this point it becomes Huntington Avenue, also known as "Avenue of the Arts". It loses its raised median briefly between its intersection with S. Huntington Ave. and Brigham Circle. It passes the Longwood Medical and Academic Area, which includes Brigham and Women's Hospital, Harvard Medical School and other hospitals; the Museum of Fine Arts; and several colleges and universities, including Northeastern University. This stretch is also a major site of baseball history; the first game of the 1903 World Series, baseball's first true World Series, was played at the Huntington Avenue Grounds, the original home of the Boston Red Sox. (The site is now part of Northeastern's campus.) The E branch of the MBTA Green Line roughly follows Huntington Avenue underground from Copley Square until it rises above ground at the Northeastern portal. It then operates in a dedicated median of Huntington Avenue between Northeastern University and the Brigham Circle stop, where trains begin street running in mixed traffic to a terminus at Heath Street. Route 9 continues past Symphony Hall and The First Church of Christ, Scientist, which is the mother church of Christian Science. It then passes Copley Place and the Prudential Center complex, before splitting, the eastbound half onto Stuart Street, the westbound onto Saint James Street, past Copley Square; both the eastbound and westbound segments of Route 9 end at Route 28. History Route 9 was established in 1933. It took over the alignment of what was Route 115 from Kenmore Square in Boston to Route 22 in North Grafton, part of the original route of US 20 between North Grafton and West Brookfield