Wentworth–Coolidge Mansion

The Wentworth-Gardner House is a historic mid-Georgian house, located at 50 Mechanic Street in Portsmouth, New Hampshire, United States. The house is operated as a museum by the Wentworth-Gardner Historic House Association. It is one of the finest extant examples of high-style Georgian architecture in New England, and played a role in the architectural preservation movement of the early 20th century. It was declared a National Historic Landmark in 1968.

The Wentworth by the Sea is a historic grand resort hotel in New Castle, New Hampshire, United States. It is one of a handful of the state's surviving Gilded Age grand hotels, and the last located on the seacoast. The Wentworth by the Sea is a member of Historic Hotels of America, the official program of the National Trust for Historic Preservation.

Peirce Island is a historic 27-acre (11 ha) island owned by the city of Portsmouth, New Hampshire, and is connected to adjacent outlying Four Tree Island. It is connected to the mainland by the Peirce Island bridge. The islands are open to the public and have views of salt marsh, tidal pools, rocky cliffs, and meadows as well as the Portsmouth Naval Shipyard, the South End, three bridges over the Piscataqua River, the "back channel", and a small island toward New Castle, New Hampshire. There is also an outdoor pool, walking paths, playgrounds, and boat launch area.There is a sewer treatment plant on the island. Public amenities include parking, a public boat ramp, walking paths, historical markers, rest room on Four Tree Island only, public pool for summer use, and a small playground.The island is located past the historic Point of Graves Burial Ground over the Peirce Island bridge. Fort Washington was located on the island. More recently, the area was known as a meeting place for gay paramours. Fort Washington and Fort Sullivan were built in 1775 and were named for George Washington and local war hero John Sullivan. Fort Washington was a star-shaped earthwork. Both forts were commanded by Captain Titus Salter (or Salten) during the American Revolution. They were re-garrisoned in the War of 1812 and abandoned after that war.The islands were dog friendly until 2016.

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.

The Wentworth Lear Historic Houses (formerly Wentworth-Gardner & Tobias Lear Historic House Association) are a pair of adjacent historic houses on the south waterfront in Portsmouth, New Hampshire. Both buildings and an 18th-century warehouse were owned by the Wentworth Lear Historic Houses and were operated as a house museum. Only the Wentworth-Gardner house is a museum.They are located at the corner of Mechanic and Gardner Streets. The two houses, built c. 1750–60, represent a study in contrast between high-style and vernacular Georgian styling. The Wentworth-Gardner House is a National Historic Landmark, and the houses are listed as the Wentworth-Gardner and Tobias Lear Houses on the National Register of Historic Places.

The second USS Portsmouth was a wooden sloop-of-war in the United States Navy in service during the mid-to-late 19th century. She was designed by Josiah Barker on the lines of a French-built privateer, and built at the Portsmouth Navy Yard, directly across the Piscataqua River from Portsmouth, New Hampshire. She was described as an improvement over USS Saratoga built in the same shipyard a year earlier. Portsmouth was launched on 23 October 1843 and commissioned on 10 November 1844, with Commander John Berrien Montgomery in command.

Seavey's Island, site of the Portsmouth Naval Shipyard, is located in the Piscataqua River in Kittery, Maine, United States, opposite Portsmouth, New Hampshire. It encompasses 278 acres (1.13 km2).

The Portsmouth Naval Shipyard, often called the Portsmouth Navy Yard, is a United States Navy shipyard in Kittery on the southern boundary of Maine near the city of Portsmouth, New Hampshire. Founded in 1800, PNS is U.S. Navy's oldest continuously operating shipyard. Today, most of its work concerns the overhaul, repair, and modernization of submarines.As of November 2021, the shipyard employed more than 6,500 federal employees. As well, some of the work is performed by private corporations (e.g., Delphinius Engineering of Eddystone, Pennsylvania; Oceaneering International of Chesapeake, Virginia; Orbis Sibro of Mount Pleasant, South Carolina; and Q.E.D. Systems Inc. of Virginia Beach, Virginia).

The Portsmouth Cottage Hospital was the first hospital built in the city of Portsmouth, New Hampshire. Opened in 1884, it was one of the first hospitals in New Hampshire, and it served as the city's primary hospital facility until 1986, when Portsmouth Regional Hospital opened. Its 1895 campus has been repurposed to house city offices and the police station, and a senior living facility. A portion of that facility, representing its oldest buildings, was listed on the National Register of Historic Places in 1996.

Point of Graves Burial Ground is a small historic cemetery in Portsmouth, New Hampshire, dating to the 17th century. It was the final resting place for many of Portsmouth's prominent residents including the Wentworth family, the Vaughan family, the Rogers, and the Lears. It is the oldest known surviving cemetery in Portsmouth, and one of the oldest in the state. It has about 125 gravestones. Previously neglected, it is now well maintained by the Mayor's Committee and the city. The cemetery plot was on a point of land that directly overlooked the Piscataqua River in earlier times.

The Piscataqua River border dispute was a dispute between the US states of Maine and New Hampshire over ownership of Seavey’s Island in the Piscataqua River, which forms the border between Maine and New Hampshire. The dispute was settled in 2002 by the US Supreme Court in favor of Maine.

The South Meetinghouse is a historic ward hall at 260 Marcy Street (corner of Meeting House Hill) in Portsmouth, New Hampshire. Completed in 1866, it is one of the city's finest examples of Italianate architecture, and a rare surviving example of a 19th-century ward hall. The building was listed on the National Register of Historic Places in 1982. It continues to be used as a community resource.