Stock Photo - The Iguassu Falls Brazil are waterfalls of the Iguazu River on the border of Brazilian State Paraná and Argentine Province Misiones The falls divide the river into the upper and lower Iguazu The Iguazu River originates near the city of Curitiba It flows through Brazil for most of its course Below its confluence with the San Antonio River, the Iguazu River forms the boundary between Argentina and Brazil The first European to find the falls was the Spanish conquistador Álvar Núñez Cabeza de Vaca in 1541 Iguazu Falls is located where the Iguazu River tumbles over the edge of the Paraná Plateau, 23 kilometres 14 mi upriver from the Iguazu´s confluence with the Paraná River