Cambridge is a city in Middlesex County, Massachusetts, and part of the Boston metropolitan area as a major suburb of Boston. As of the 2020 United States Census, the city's population was 118,403, making it the fourth most populous city in the state, behind Boston, Worcester, and Springfield. It is one of two de jure county seats of Middlesex County, although the county's government was abolished in 1997. Situated directly north of Boston, across the Charles River, it was named in honor of the University of Cambridge in England, once also an important center of the Puritan theology embraced by the town's founders.
Newton is a city in Middlesex County, Massachusetts, United States. It is approximately 7 miles (11 km) west of downtown Boston. Newton resembles a patchwork of thirteen villages, without a city center. According to the 2020 U.S. Census, the population of Newton was 88,923.
Billerica is a town in Middlesex County, Massachusetts, United States. The population was 42,119 according to the 2020 census. It takes its name from the town of Billericay in Essex, England.
Woburn is a city in Middlesex County, Massachusetts, United States. The population was 40,876 at the 2020 census. Woburn is located 9 miles (14 km) north of Boston. Woburn uses Massachusetts' mayor-council form of government, in which an elected mayor is the executive and a partly district-based, partly at-large city council is the legislature. It is the only one of Massachusetts' 351 municipalities to refer to members of its City Council as "Aldermen."
Burlington is a town in Middlesex County, Massachusetts, United States. The population was 26,377 at the 2020 census.
Wilmington is a town in Middlesex County, Massachusetts, United States. Its population was 23,349 as of the 2020 United States Census.
Greater Boston is the metropolitan region of New England encompassing the municipality of Boston and its surrounding areas. The region forms the northern arc of the Northeast megalopolis, so Greater Boston means both a metropolitan statistical area (MSA) and a combined statistical area (CSA), which is broader. The MSA consists of most of the eastern third of Massachusetts, excluding the South Coast and Cape Cod; the CSA additionally includes the municipalities of Providence, Manchester, Worcester, the South Coast region, and Cape Cod. While the city of Boston covers 48.4 square miles (125 km2) and has 675,647 residents as of the 2020 census, the urbanization has extended well into surrounding areas and the CSA has a more than 8.4 million people, making it one of the most populous such regions in the U.S. The CSA is one of two in Massachusetts, the other being Greater Springfield. Greater Boston is the only CSA in New England that lies in three states ; some definitions extend it into a fourth (Connecticut).
The Boston and Lowell Railroad was a railroad that operated in Massachusetts in the United States. It was one of the first railroads in North America and the first major one in the state. The line later operated as part of the Boston and Maine Railroad's Southern Division.
The B branch, also called the Commonwealth Avenue branch or Boston College branch, is a branch of the MBTA Green Line light rail system which operates on Commonwealth Avenue west of downtown Boston, Massachusetts. One of four branches of the Green Line, the B branch runs from Boston College station down the median of Commonwealth Avenue to Blandford Street. There, it enters Blandford Street portal into Kenmore station, where it merges with the C and D branches. The combined services run into the Boylston Street subway and Tremont Street subway to downtown Boston. B branch service has terminated at Government Center since October 2021. Unlike the other branches, the B branch runs solely through the city limits of Boston. The Green Line Rivalry between Boston College and Boston University is named in reference to the B branch, which runs to both universities.
The Department of Conservation and Recreation (DCR) is a state agency of the Commonwealth of Massachusetts, situated in the Executive Office of Energy and Environmental Affairs. It is best known for its parks and parkways. The DCR's mission is "To protect, promote and enhance our common wealth of natural, cultural and recreational resources for the well-being of all." The agency is the largest landowner in Massachusetts.
The Haverhill Line is a branch of the MBTA Commuter Rail system, running north from downtown Boston, Massachusetts through the cities and towns of Malden, Melrose, Wakefield, Reading, Wilmington, Andover, North Andover, Lawrence, and Haverhill.
The Lexington and West Cambridge Railroad was a railroad company chartered in 1845 and opened in 1846 that operated in eastern Massachusetts. It and its successors provided passenger service until 1977 and freight service until 1980 or early 1981.
North Billerica is an unincorporated village of the town of Billerica, Massachusetts, United States, one of the nine sections (hamlets) that make up the Town of Billerica. It is the home to Faulkner and Talbot mills and the North Billerica Train Depot. The Middlesex Canal was built through the village in 1783 and the Boston and Lowell Railroad was put through in the 1840s.
Natick Center station is an MBTA Commuter Rail station in Natick, Massachusetts served by the Framingham/Worcester Line. The station, located below grade in a wide cut adjacent to North Main Street, has two side platforms serving the line's two tracks. The second-busiest non-accessible station on the system, it is undergoing a major accessibility renovation and modernization from 2020 to 2024.
Haverhill station is an intercity and regional rail station located in downtown Haverhill, Massachusetts, United States. It is served by Amtrak's Downeaster service and the MBTA Commuter Rail Haverhill/Reading Line; it is the northern terminus of MBTA service.
Melrose/Cedar Park is an MBTA Commuter Rail station located in downtown Melrose, Massachusetts. The station has two low-level platforms serving the two tracks of the Haverhill Line; it is not accessible.
West Natick station is a commuter rail station on the MBTA Commuter Rail Framingham/Worcester Line, located off West Central Street (MA-135) in Natick, Massachusetts. It was opened in 1982 as a park and ride station.
North Wilmington is an MBTA Commuter Rail station in North Wilmington, Massachusetts. It serves the Haverhill Line, and is located off Middlesex Avenue (MA-62). It has some of the most limited station faculties on the MBTA system - a single short bare platform serving the line's single track at the location, with a small parking lot and single bus shelter for passengers - but is a stop for all trains on the line. North Wilmington station is not accessible.
Mystic Valley Parkway station is a proposed light rail station on the MBTA Green Line in Somerville, Massachusetts; it would be built as part of a future third phase of the Green Line Extension (GLX). Route 16 would consist of one island platform, which would serve the E branch's two tracks.
Silver Lake is a kettle lake in Wilmington, Massachusetts. Originally called Sandy Pond, the lake is home to the town beach and draws in visitors from all over Greater Boston during the summer. The lake is at the heart of a USGS recognized populated place in Wilmington and Tewksbury, also called Silver Lake.
United States 
Massachusetts