American Pictures/ Tony Morrison
O Salto das Sete Quedas do Guaíra - known as the Sete Quedas or
Guaíra Falls on the Paraná river disappeared with the construction
of the Itaipú dam. Situated on the Upper Paraná river, the falls
were said to have the world's largest volume of falling water. This resulted from
the Paraná being forced through a narrow canyon which reduced the width
of the river from 1250 ft (381m) to 200 ft (61m).