Andalusia is in the south of the Iberian peninsula, just to the south of the autonomous communities of Extremadura and Castile-La Mancha; west of the autonomous community of Murcia and the Mediterranean Sea; east of Portugal and the Atlantic Ocean; and north of the Mediterranean Sea and the Strait of Gibraltar. The small British Overseas Territory of Gibraltar shares a land border with the Andalusian province of Cádiz at the eastern end of the Strait of Gibraltar.