A beautiful legend Tupi-Guarani explains the emergence of the Iguazu Falls. "Many years ago, the Iguazu River flowed free, and without rapids or cataracts. At its margins inhabited Caingangues Indians, who believed that the great shaman M'Boy was the serpent-god, son of Tupa. Wicked, chieftain of the tribe, had a daughter named suit, which would be devoted to the worship of God M'Boy, divinity in the form of large snake.

Tarobá young warrior of the tribe falls in love with Naipi and on the consecration of a young escape to the river that calls them - "Tarobá, suit, come with me!" Both went down the river in a canoe.

M'Boy, furious with the fugitives in the form of a large snake, into the ground and twisted up, caused landslides that were falling on the river, forming the depths of the falls. Wrapped in the water, dropped from great height. Tarobá turned into a palm tree on the edge, and the suit, on a rock near the large waterfall, constantly lashed by the powerful waters. M'Boy guarded by the serpent-god, stay there, Tarobá sentenced to contemplate forever without your loved one can touch it.