Middlesex County, Massachusetts

The Isaac Davis Trail, also known as the Acton Trail, is an historic 6-mile (9.7 km) trail running east–west in the towns of Acton and Concord, Massachusetts. The trail was significant in 1775 when it was used by Captain Isaac Davis and the Acton Minutemen to march on Concord during the battles of Lexington and Concord. The trail was added to the National Register of Historic Places in 1972.The trail begins at Isaac Davis' house in Acton, and ends at western end of the North Bridge in the Minuteman National Historical Park in Concord. Most of the route is now paved roads, where in some cases the alignment no longer matches the exact route. Despite this, the trail route evokes the time of the march, with its roadways lined with stone walls, and houses generally set back from the street. The trail first runs northeast about 1.25 miles (2.01 km) northeast, along Hayward Rd, Musket Dr, Minuteman Rd, Woodbury Ln, and Main St. It then turns more directly east for 1.5 miles (2.4 km), along a town-owned easement on private property, to Strawberry Hill Rd. It follows Strawberry Hill Rd southerly for 1.75 miles (2.82 km) to Barrett's Mill Rd, which runs easterly 0.75 miles (1.21 km) to meet Lowell Rd in Concord. It crosses Lowell Rd, following Barnes Hill Rd and crossing Liberty Rd to reach the Muster Field above the North Bridge.

The Col. James Barrett Farm (Barrett's Farm) is a historic American Revolutionary War site in Concord, Massachusetts, associated with the revolution's first battle, the 1775 battles of Lexington and Concord. His farm was the storage site of all the town of Concord's militia gunpowder, weapons and two pairs of prized bronze cannons.

The Northeastern Correctional Center is a minimum security/pre-release state prison in Massachusetts that opened in 1932. NCC sits on 300 acres of farmland and provides many inmates with work opportunities prior to being released from prison. The facility is accredited by the American Correctional Association (ACA), managed by the Massachusetts Department of Correction, and overseen by the Massachusetts Department of Public Safety. On January 6, 2020, there were 188 inmates in general population beds.

Middlesex School is a coeducational, non-sectarian, day and boarding independent secondary school for grades 9–12 located in Concord, Massachusetts. It was founded as an all-boys school in 1901 by a Roxbury Latin School alumnus, Frederick Winsor, who headed the school until 1937. Middlesex began admitting girls in 1974. The school is a member of the Independent School League and is one of five schools collectively known as St. Grottlesex. The school was named for the county Middlesex in which it stands. The campus was designed by the Olmsted Brothers architectural firm, and the firm Peabody and Stearns designed most of the main buildings. A recent addition is the Clay Centennial Center, completed in 2003, which hosts science and math classes as well as an observatory. The school is 70% boarding students and 30% day students. In 2019–20, boarding students came from 24 states and 20 countries. Middlesex accepted only 14% of students who applied to enter in 2022–23.

The Dr. John Cuming House is a historic house located west of Concord, Massachusetts, at 998 Elm Street, at Barretts Mill Road and Reformatory Circle.

The Massachusetts Correctional Institution at Concord (MCI-Concord) is a medium security prison for men located in Concord, Massachusetts in the United States. Opened in 1878, it is the oldest running state prison for men in Massachusetts. This prison is under the jurisdiction of the Massachusetts Department of Correction. There are 570 inmates with a total capacity of 614 general population beds.

The John Robbins House is a historic house at 144 Great Road in Acton, Massachusetts. Built in 1800, it is a well-preserved example of a late Georgian/early Federal country house, and was the farmhouse for one of Acton's largest 19th-century farms. The interior includes well-preserved period details, including stencilwork by the itinerant artist Moses Eaton, Jr. The house was listed on the National Register of Historic Places on July 25, 2003.

John E. "Dropkick" Murphy (May 12, 1912 in Malden, Massachusetts – October 17, 1977 in Concord, Massachusetts) was an American professional wrestler and sanatorium owner. He operated the Bellows Farms Sanatorium, an alcoholic rehabilitation facility in Acton, Massachusetts from 1941 to 1971. The band Dropkick Murphys is named after him.

The Nashoba Brook Pencil Factory Site contains the ruins of a 19th-century dam-powered pencil factory. This factory was one of several in Acton and Concord, Massachusetts at the time that brought important developments to pencil manufacturing. All that remain today of the factory are the ruins of its dam and a few mechanical components. The site is in the Nashoba Brook Conservation Area in Acton, Massachusetts, along Nashoba Brook and the old Davis Road Dam. Visitors can access the site by following a marked path from the Davis Road parking area for the Nashoba Brook Conservation Area

The Nashoba Brook Stone Chamber is an underground stone structure in the woods of the Nashoba Brook Conservation Area of Acton, Massachusetts. Its more common name is the "potato cave", which comes from the traditional assumption that it was once used as a root cellar. Research and excavation from 2006 supports this assertion, finding evidence of construction from the 18th or 19th century for the purpose of storing food. Some argue that it may originally have been a pre-colonial native American ceremonial stone landscape structure. Local lore states that it also served as shelter for workers on the nearby railroad in the 19th century.

The Hosmer Homestead (also known as the Hosmer/Baker Farm) is a historic house located at 138 Baker Avenue in Concord, Massachusetts.

The Jonathan Hildreth House is a historic house in Concord, Massachusetts.