This river runs through a smooth geography until it reaches a series of faults, and suddenly an 80 m. canyon in the Devil's Throat where the water produces a thundering sound and then drains into the Parana river.
A legend says that a big snake called "Boi" lived in the river. To calm its ferocity, aborigines sacrificed a woman every year as an offering. But once a brave guarani aborigin kidnapped the woman and saved her from the traditional rite escaping through the river. Boi burst in anger, bent its body and split the river forming the cataracts separating the man and the woman.
Walking on the footbridge