Punta Dúngeness is a headland at the eastern entrance of the Strait of Magellan on its north shore, opposite Cabo del Espiritu Santo in Tierra del Fuego. West of the Punta Dungeness lies the Bahia Possession. Punta Dungeness marks the border between Chile and Argentina, and according to the Treaty of Peace and Friendship of 1984 between Chile and Argentina the line between Punta Dungeness and Cabo del Espiritu Santo marks the limits of each country's territorial waters. It is the southernmost point on the mainland of Argentina, and the easternmost point on the mainland of Chile. There is a lighthouse on the Chilean side.
In this one place the Atlantic Ocean washes the shores of Chile, and enter to Strait of Magellan.