The Iguazú Falls represent the largest system of waterfalls in the World. The Iguazú River plunges down 60-80 m over a sequence of basaltic layers in generally two steps, whereby most of the falls are located on the territory of Argentina, some in Brazil. Background from left to right: Salto San Martín, Salto Mbiguá, Salto Bernabé Méndez.