New Castle, New Hampshire

The New Castle Congregational Church is a congregation of the United Church of Christ, located at 65 Main Street in New Castle, New Hampshire. Its church, the only ecclesiastical building in the small community, was built in 1828 by a local master builder, based on the architectural patterns published by Asher Benjamin, and also based in part on the St. John's Church in nearby Portsmouth. It has undergone little alteration since its construction.The building was listed on the National Register of Historic Places in 2015, and the New Hampshire State Register of Historic Places in 2007.

The Harbor Defenses of Portsmouth was a United States Army Coast Artillery Corps harbor defense command. It coordinated the coast defenses of Portsmouth, New Hampshire and the nearby Portsmouth Naval Shipyard in Kittery, Maine from 1900 to 1950, both on the Piscataqua River, beginning with the Endicott program. These included both coast artillery forts and underwater minefields. The command originated circa 1900 as the Portsmouth Artillery District, was renamed Coast Defenses of Portsmouth in 1913, and again renamed Harbor Defenses of Portsmouth in 1925.

The Capture of Fort William and Mary took place in Portsmouth, New Hampshire, on December 14, 1774, when local Patriots led by John Langdon stormed Fort William and Mary guarding the mouth of the busy seaport. They overcame a six-man caretaker detachment) and seized the garrison's powder, which was distributed through several towns in the colony for potential use in the looming struggle against Great Britain. On December 15, 1774, patriots led by John Sullivan again raided the fort, this time seizing numerous cannons, later used in the pivotal Battle of Bunker Hill. The incident is significant as one of the first overt acts of the American Revolutionary War and the only battle to take place in the state of New Hampshire.

Fort William and Mary was a colonial fortification in Britain's worldwide system of defenses, defended by soldiers of the Province of New Hampshire who reported directly to the royal governor. The fort, originally known as "The Castle," was situated on the island of New Castle, New Hampshire, at the mouth of the Piscataqua River estuary. It was renamed Fort William and Mary circa 1692, after the accession of the monarchs William III and Mary II to the British throne. It was captured by Patriot forces, recaptured, and later abandoned by the British in the Revolutionary War. The fort was renamed Fort Constitution in 1808 following rebuilding. The fort was further rebuilt and expanded through 1899 and served actively through World War II.

Portsmouth Harbor Lighthouse is a historic lighthouse located within Fort Constitution in New Castle, New Hampshire, United States.

The Gerrish Warehouse was a historic 18th-century warehouse, located on Pepperrell Cove in Kittery Point, Maine. Built c. 1710, it was one element of the Pepperrell family's shipping empire, notably run in the mid-18th century by Sir William Pepperrell. Converted into a ship chandlery in the 19th century, it was sold to the Maine Maritime Museum in 1976, and was added to the National Register of Historic Places in 1977. The museum's plan to move the building by barge to a new location was judged infeasible, and it was subsequently demolished after the museum had recovered its contents. It was removed from the National Register in 2015.

The Lady Pepperrell House is an American historic house in Kittery Point, Maine. It stands on State Route 103, opposite the First Congregational Church and Parsonage. Built in 1760 by Lady Mary Pepperrell, widow of Sir William Pepperrell, the house is one of the finest examples of Georgian architecture in New England. Pepperrell was the only colonial American to be honored with a baronetcy, awarded by King George II for his leadership of the 1745 expedition against the French Fortress Louisbourg on Cape Breton Island. The house was designated a National Historic Landmark in 1960, but remains in private ownership, subject to preservation restrictions held by Historic New England.

The William Dean Howells House is a historic house at 36 Pepperrell Road in Kittery Point, Maine. Built c. 1870, this house was for many years the summer residence of writer and editor William Dean Howells, best known as editor of Atlantic Monthly magazine. The house was listed on the National Register of Historic Places in 1979 (where the listing misspells the name "Howels").

The First Congregational Church and Parsonage is a historic church complex at 23 Pepperrell Road (Maine State Route 103) in the Kittery Point section of Kittery, Maine. Built in 1730 for a congregation first organized in 1653, the church is the oldest in Kittery, and one of the oldest in the state of Maine. It is accompanied by a parsonage house, built in 1729, and a small cemetery, established in 1733. The buildings were listed on the National Register of Historic Places in 1978; the cemetery was added to the listing in 1997.

Fort McClary is a former defensive fortification of the United States military located along the southern coast at Kittery Point, Maine at the mouth of the Piscataqua River. It was used throughout the 19th century to protect approaches to the harbor of Portsmouth, New Hampshire and the Portsmouth Naval Shipyard in Kittery. The property and its surviving structures are now owned and operated by the State of Maine as Fort McClary State Historic Site, including a blockhouse dating from 1844.

Fort Stark is a former military fortification in New Castle, New Hampshire, United States. Located at Jerry's Point (also called Jaffrey's Point) on the southeastern tip of New Castle Island, most of the surviving fort was developed in the early 20th century, following the Spanish–American War, although there were several earlier fortifications on the site, portions of which survive. The fort was named for John Stark, a New Hampshire officer who distinguished himself at the Battle of Bennington in the American Revolution. The purpose of Fort Stark was to defend the harbor of nearby Portsmouth and the Portsmouth Naval Shipyard. The fort remained in active use through the Second World War, after which it was used for reserve training by the US Navy. The property was partially turned over to the state of New Hampshire in 1979, which established Fort Stark Historic Site, and the remainder of the property was turned over in 1983. The grounds are open to the public during daylight hours.

Portsmouth Naval Prison is a former U.S. Navy and Marine Corps prison on the grounds of the Portsmouth Naval Shipyard (PNS) in Kittery, Maine. The building has the appearance of a castle. The reinforced concrete naval prison was occupied from 1908 until 1974.