 The western end of the island has rolling hills with elevations as high as with several small swamps in the valleys; the eastern side of the island is swampy, and contains a lagoon with one of the largest mangrove forests in Haiti.The island is also surrounded by several dangerous shoals, reefs, and rocks that have been the cause of many shipwrecks throughout history, including that of the famous Canadian fishing and racing schooner "Bluenose", which was wrecked on the island in 1946.The population of the island in 2015 was 14,004 adult inhabitants.