Antigua and Barbuda lie in the eastern arc of the Leeward Islands of the Lesser Antilles, separating the Atlantic Ocean from the Caribbean Sea. Antigua is 650 km (400 mi) southeast of Puerto Rico; Barbuda lies 48 km (30 mi) due north of Antigua, and the uninhabited island of Redonda is 56 km (35 mi) southwest of Antigua. The largest island of Antigua, is 21 km (about a dozen miles) across and 281 km2 (about a hundred square miles) in area.