Nevis /ˈniːvɪs/ is an island in the Caribbean Sea that forms part of the inner arc of the Leeward Islands chain of the West Indies. It is located near the northern end of the Lesser Antilles archipelago, about 350 km east-southeast of Puerto Rico and 80 km west of Antigua. Its area is 93 km² and capital is Charlestown. Nevis and the island of Saint Kitts to the northwest form the Federation of Saint Kitts and Nevis. The two islands are separated by a shallow two-mile (3.22 km) channel known as "The Narrows". Nevis is conical in shape with a volcanic peak known as Nevis Peak at its centre.