Punta Dúngeness is a headland at the eastern entrance of the Strait of Magellan

Strait of Magellan

The Strait of Magellan comprises a navigable sea route immediately south of mainland South America and north of Tierra del Fuego...

 on its north shore, opposite Cabo del Espiritu Santo in Tierra del Fuego

Tierra del Fuego

Tierra del Fuego is an archipelago off the southernmost tip of the South American mainland, across the Strait of Magellan. The archipelago consists of a main island Isla Grande de Tierra del Fuego divided between Chile and Argentina with an area of , and a group of smaller islands including Cape...

. West of the Punta Dungeness lies the Bahia Possession. Punta Dungeness marks the border between Chile

Chile

Chile ,officially the Republic of Chile , is a country in South America occupying a long, narrow coastal strip between the Andes mountains to the east and the Pacific Ocean to the west. It borders Peru to the north, Bolivia to the northeast, Argentina to the east, and the Drake Passage in the far...

 and Argentina

Argentina

Argentina , officially the Argentine Republic , is the second largest country in South America by land area, after Brazil. It is constituted as a federation of 23 provinces and an autonomous city, Buenos Aires...

, and according to the Treaty of Peace and Friendship of 1984 between Chile and Argentina

Treaty of Peace and Friendship of 1984 between Chile and Argentina

The Treaty of Peace and Friendship of 1984 between Chile and Argentina was signed into agreement at the Vatican on 29 November 1984.It was ratified...

 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

Strait of Magellan

The Strait of Magellan comprises a navigable sea route immediately south of mainland South America and north of Tierra del Fuego...

.