Joseph Hosmer House

Xavier High School was a private all-boys college preparatory Catholic high school in Concord, Massachusetts which operated from 1962 to 1971.

Emerson Hospital is a hospital located in Concord, Massachusetts, at 133 Old Road to Nine Acre Corner, founded in 1911 on 40 acres (16 ha) donated by Charles Emerson, a nephew of Ralph Waldo Emerson. It is a full-service, non-profit community hospital and acute care medical center with (as of 2006) 177 beds, providing advanced medical services to over 300,000 individuals in 25 towns.

The Thoreau–Alcott House is a historic house at 255 Main Street in Concord, Massachusetts, United States that was home to the writers Henry David Thoreau and Louisa May Alcott at different times.

The Hubbard-French District is a historic district at 324 and 342 Sudbury Road in Concord, Massachusetts. It consists of three parcels of land that are the center of the Hubbard family farm. It includes two houses: the 1787-88 Georgian style Thomas Hubbard House, and the Queen Anne style artist's studio of renowned sculptor Daniel Chester French, whose parents owned the Hubbard house. French, who had the house built to his specifications as a studio space, used it for that purpose until 1888, when he moved to New York City. The Hubbard was later owned by historian Samuel Eliot Morison.The district was listed on the National Register of Historic Places in 2000.

Concord station is a commuter rail station on the MBTA Commuter Rail Fitchburg Line located in downtown Concord, Massachusetts. It has two side platforms, which are low-level and not accessible, serving the line's two tracks.

The Sudbury River is a 32.7-mile-long (52.6 km) tributary of the Concord River in Middlesex County, Massachusetts, in the United States.Originating in the Cedar Swamp in Westborough, Massachusetts, near the boundary with Hopkinton, the Sudbury River meanders generally northeast, through Fairhaven Bay, and to its confluence with the Assabet River at Egg Rock in Concord, Massachusetts, to form the Concord River. It has a 162-square-mile (420 km2) drainage area. A 1775 map identifies the river by this name as passing through the town of Sudbury, itself established 1639. On April 9, 1999, nearly 17 miles (27 km) of the river were "recognized for their outstanding ecology, history, scenery, recreation values, and place in American literature," by being designated as a part of the National Wild and Scenic Rivers System. The 14.9-mile (24.0 km) segment of the Sudbury River beginning at the Danforth Street Bridge in the city of Framingham, downstream to the Route 2 bridge in Concord, is designated as a Scenic River, and the 1.7-mile (2.7 km) segment from the Route 2 bridge downstream to its confluence with the Assabet River at Egg Rock is designated as a Recreational River, along with adjoining stretches of the Assabet and Concord rivers.Mercury contamination was discovered in the 1970s from the Nyanza plant in Ashland. The EPA subsequently listed the town as a toxic site and led a cleanup effort to repair the damage. It is still recommended that fish caught downriver not be eaten.

Egg Rock is an outcrop of Silurian Straw Hollow Diorite at the confluence of the Assabet and Sudbury rivers, where they form the Concord River in Concord, Massachusetts. The outcrop is located on a roughly oval intermittent island of about 100 by 50 meters. Egg Rock is usually accessible using foot trails over land, but during high river levels the island is separated from the mainland by a narrow channel. The highest point of Egg Rock is about 39 meters above mean sea level and about 6 meters above normal river level. The United States Geological Survey (USGS) Geographic Names Information System (GNIS) includes Egg Rock as GNIS feature 617309, classified as an island. In the GNIS database as of February 2010, the listed position (latitude 42.4645383, longitude -71.3592266) is misplaced by about 125 meters to the southwest, and is not actually located on the intermittent island. A more correct position is latitude 42.4651, longitude -71.3585.

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

Concord Academy (also known as CA), established in 1922, is a coeducational, independent college preparatory school for boarding and day students in grades 9-12. The school is situated in Concord, Massachusetts. The school enrolled 395 boarding and day students as of 2022.

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

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 Ephraim Potter House, a historic house and former pest house at 158 Fairhaven Road in Concord, Massachusetts, is also known as the Pest House, a name used in the 18th century to describe a building in which to quarantine those afflicted with communicable diseases such as tuberculosis, cholera, or smallpox.The house was built before 1792 and added to the National Register of Historic Places in 1977, where it is listed at 153 Fairhaven Road. John Fitzgerald, the current owner of this old property, describes that it is his "dream is to keep it standing."The booklet, "Old Houses of Concord", by Mary R. Fenn contains the following information on the Ephraim Potter House:"Deacon Luke Potter, one of the first settlers, lived on the corner of Heywood Street and Lexington Road. His son Judah was the only one to perpetuate the family name before Judah's death in that house when it burned to the ground (June 20, 1721). Deacon Luke had acquired a large tract of land in the south quarter, in the vicinity of Fairhaven Road. At the time of the second division, houses were built on the property." "In 1752, Ephaim Potter married Sarah Taylor, which probably dates this house. Ephraim was one of the men who stored provincial supplies in his house prior to the Revolution - tents, tow cloth, canteens, etc." "At the time of the smallpox epidemic, vaccination was a newfangled idea; many people thought it was dangerous. When Ephraim's wife died of smallpox in 1792, it was thought to be important to engrave on her headstone that she had taken the disease in the natural way. She was buried in the small cemetery diagonally across from the house (across Route 2). Although hers is the only gravestone, it is thought that there are other graves there as well. The Potter House was used at this time as a hospital for those who were recovering from their vaccination treatment. Dr. Barrett was in the house one day when a traveler knocked on the door and asked if this were the hospital. "Yes," replied the doctor, "and I am one of the patients." "Elbridge Hayden bought the house in the early eighteen hundreds".