The Strait of Magellan (Spanish:Estrecho de Magallanes), also called the Straits of Magellan, is a navigable sea route separating mainland South America to the north and Tierra del Fuego to the south. The strait is the most important natural passage between the Atlantic and Pacific oceans but it is considered a difficult route to navigate because of the unpredictable winds and currents and the narrowness of the passage.