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Rising from the falls, Iguazu National Park.

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The Great Waterfall of Iguazu, this spectacular site, lies on the border of Argentina and Brazil.

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It was simply named Great Waters by the local Indians.

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It consists of more than 270 cascades and waterfalls,

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situated on a fault and created by tectonic movements.

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The natives have named the falls Devil's Throat, Hidden Throat and more.

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There's a legend about the rainbow that crosses over the falls.

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God told the shaman, I will show the world a marvelous thing.

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No one believed him and on the night of a full moon,

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there was a flash of lightning and suddenly a rainbow appeared.

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The misty clouds of water endlessly engulf the waterfalls.

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Spray rises continually and forms a mist that climbs high into the sky.

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The water eventually falls onto the surrounding forest.

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It is this cycle of water that has nurtured diverse species of animals and vegetation

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in this subtropical jungle.

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This is an opossum.

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It's the only marsupial found outside Australia.

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The jungle has 2,000 species of plants.

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Great dusky swifts swoop to feed on them and then vanish into the plummeting waters.

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They have plunged into the waterfalls.

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In fact, the swifts nest behind the falls.

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The curtain of water keeps out predators.

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A swift has a remarkable capacity of turning its head 180 degrees to keep watch behind.

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But the law of the jungle punishes any mistake.

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It took millions of years to make this spectacular scenery and the great cycle of life,

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all part of a microcosm that rises from the falls.