Antártica Chilena Province is the southernmost and one of four provinces in Chile's southernmost region, Magallanes and Antártica Chilena Region (XII). The capital is Puerto Williams. The province comprises the extreme southern part of Isla Grande de Tierra del Fuego (south of the Cordillera Darwin), the islands south and west of Isla Grande, and Chile's claims in Antarctica. The province is administratively divided into two communes (comunas):  Cabo de Hornos, located at the southern tip of South America, and Antártica, a wedge-shaped claim of Antarctica, which is not internationally recognized. Its total area of makes it almost twice as large as all other provinces of Chile combined.