Nevis is a small island in the Caribbean Sea that forms part of the inner arc of the Leeward Islands chain of the West Indies. Nevis and the neighbouring island of Saint Kitts constitute one country: the Federation of Saint Kitts and Nevis. Nevis is located near the northern end of the Lesser Antilles archipelago, about 350 kilometres (220 mi) east-southeast of Puerto Rico and 80 kilometres (50 mi) west of Antigua. Its area is 93 square kilometres (36 sq mi) and the capital is Charlestown.