Punta Dungeness at defines on the north side of the eastern entrance of the Strait of Magellan (Sp. Estrecho de Magallanes), together with Cabo del Espiritu Santo on the south side (according to the Treaty of Peace and Friendship between Argentina and Chile). It is the southernmost point on the South American mainland of Argentina, on the border with Chile. There is an old lighthouse on the Chilean side.
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