Fig. 7. The Cape Horn Biosphere Reserve includes the archipelago south of Tierra del Fuego Island. On the southwestern peninsula of Tierra del Fuego, the biosphere reserve also includes the Darwin Mountain Range. It is the only Chilean biosphere reserve that comprises terrestrial and marine ecosystems, and is the largest of southern South America, i.e., Uruguay, Argentina, Chile, by extending over an area of 48,843 km2 composed of 19,172 km2 and 29,670 km2 of terrestrial and marine areas, respectively.