Seavey's Island side of Seavey's Island at the former site of Camp Long, a stockade named for Secretary of the Navy John Long, where 1,612 prisoners of war from the Battle of Santiago de Cuba were confined from July 11 to mid-September 1898 during the Spanish–American War. Camp Heywood, a Marine camp named after Colonel Charles Heywood, was located just north of the naval prison. It was occupied after the 1st Battalion's return from Cuba in late August until September 21, 1898. According to the National Trust for Historic Preservation, the Portsmouth Naval Shipyard has 62 buildings listed on the National Register
Santiago de Cuba huge windows and crowded balconies. Preserved historical treasures include the first home in the Americas, the first cathedral in Cuba, Cobre mine, the first copper mine opened in the Americas, and the first Cuban museum. The local citadel of San Pedro de la Roca is inscribed on the UNESCO World Heritage List as "the most complete, best-preserved example of Spanish-American military architecture, based on Italian and Renaissance design principles". The Baconao Park was inscribed on the UNESCO World Heritage Biosphere Reserve List in 1987. Santiago de Cuba is located in the southeast of the island at coordinates 20° 01' 17.42"