The Boston National Historical Park is an association of sites that showcase Boston's role in the American Revolution and other parts of history. It was designated a national park on October 1, 1974. Seven of the eight sites are connected by the Freedom Trail, a walking tour of downtown Boston. All eight properties are National Historic Landmarks. Five of the sites that make up the park are neither owned nor operated by the National Park Service, and operate through cooperative agreements established upon the park's creation. The park service operates visitor centers in Faneuil Hall and at the Charlestown Navy Yard. Boston National Historical Park, along with Boston African American and Boston Harbor Islands, comprise the National Parks of Boston, all under the same superintendent. Locations Park Properties Bunker Hill Monument The Bunker Hill Monument, located at the top of Breed's Hill in the Charlestown neighborhood of Boston, is a granite obelisk that was constructed in the mid-19th century to commemorate the Battle of Bunker Hill, fought June 17, 1775. The property is owned and administered by the National Park Service. Bunker Hill Museum The park operates a small museum dedicated to the battle of Bunker Hill and other associated history, across the street from monument grounds. The museum is known for its large-scale diorama of the battle on the second floor. Charlestown Navy Yard The Charlestown Navy Yard is located on the southern edge of Charlestown on the banks of the Charles River. Used during the American Revolutionary War as a shipyard, it continued to serve as a base of the United States Navy until 1975, when the Navy turned the property over to the National Park Service. The Yard is home to (the oldest floating commissioned naval vessel in the world), and , a destroyer from the Second World War that is now operated as a museum ship. Dorchester Heights Dorchester Heights was fortified by General George Washington in March 1776, compelling the British to withdraw from Boston and ending the Siege of Boston. A monument was erected on the site in 1902. Located in South Boston, Dorchester Heights is the only site in the park that is not on the Freedom Trail. Affiliated Sites and Freedom Trail Partners Faneuil Hall Faneuil Hall was first constructed in the 1740s, and was the site of important pro-independence speeches. The hall is owned and operated by the city of Boston,