steep rocky headland on Hornos Island, Tierra del Fuego Archipelago, southern Chile. Located off the southern tip of mainland South America, it was named Hoorn for the birthplace of the Dutch navigator Willem Corneliszoon Schouten (Schouten, Willem), who rounded it in 1616. False Cape Horn (Falso Cabo de Hornos), on Hoste Island, 35 miles (56 km) northwest, is sometimes mistaken for it. Navigation in the rough waters around the cape is hazardous. The climate is windy and cold year-round.