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None. There never was a waterway since North America was in the way.
The Portuguese colonies in 1800 were Brazil in South America and the Algarves in Africa.
The explorer who discovered the straits around the southern tip of South America in 1520 and whose crew completed first circumnavigation of the world was Ferdinand Magellan. The straits were named after him in his honor.
Juan Rodríguez Cabrillo was a Portuguese explorer who traveled the west coast of North America on behalf of Spain. He was the first European explorer to navigate the coast of what we now call California.
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It came from the Portuguese explorer Amerigo Vespucci.
The answer is The Strait of Magellan
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The Strait of Magellan.The Straits of MagellanA particularly famous straight in the southern part of South America is the Straight of Magellan. The strait is named after the great Portuguese explorer of the same name.
The French explorer who reached the most southern point in America was Ferdinand Magellan in 1520 during his circumnavigation of the globe. Magellan's expedition reached the southern tip of South America, now known as Cape Horn.
America is named for a Portuguese explorer and mapmaker. His name was Amerigo Vespucci. He was born in 1454 and died in 1512.
The Panama Canal.
The Panama Canal is a man-made waterway in Central America.
The Portuguese colonized Brazil in the 1500's.
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Magellan Strait
because he was the first one to pronounce that America was another continent