The Charlestown Navy Yard is a historic site located in Charlestown, Massachusetts. Established in 1800, it served as a shipbuilding facility for the United States Navy. The yard played a significant role in constructing and repairing naval vessels, including famous ships like the USS Constitution, which is now a museum ship. Today, the Charlestown Navy Yard is part of the Boston National Historical Park. Visitors can explore its rich maritime history, view preserved ships, and learn about naval operations through various exhibits. The site also features the USS Cassin Young, a World War II destroyer, and offers scenic views of the Boston skyline.