Saint Kitts (also known more formally as Saint Christopher Island (Saint-Christophe in French)) is an island in the West Indies. The west side of the island borders the Caribbean Sea, and the eastern coast faces the Atlantic Ocean. Saint Kitts and the neighbouring island of Nevis constitute one country: the Federation of Saint Kitts and Nevis. The island is one of the Leeward Islands in the Lesser Antilles. It is situated about southeast of Miami, Florida. The land area of St. Kitts is about , being approximately long and on average about across. Saint Kitts has a population of around 45,000, the majority of whom are mainly of African descent. The primary language is English, with a literacy rate of approximately 98%. Residents call themselves Kittitians. Brimstone Hill Fortress National Park, a UNESCO World Heritage Site, is the largest fortress ever built in the Eastern Caribbean. The island of Saint Kitts is home to the Warner Park Cricket Stadium, which was used to host 2007 Cricket World Cup matches. This made St. Kitts and Nevis the smallest nation to ever host a World Cup event. Saint Kitts is also home to several institutions of higher education, including Ross University School of Veterinary Medicine, Windsor University School of Medicine, and the University of Medicine and Health Sciences.