One of the oldest neighborhoods of Boston, Charlestown is home to the Bunker Hill Monument and historic Charlestown Navy Yard. Charlestown today is a mainly residential neighborhood with an institutional presence. Major institutions include Bunker Hill Community College, Spaulding Rehabilitation Center, and a facility of Massachusetts General Hospital. The Navy Yard, home to , is now part of the Boston National Historical Park, which marks the southern edge of the neighborhood. The waterfront has two marinas, Constitution Marina and Shipyard Quarters Marina.