Photographer: Robert M. Naclerio, MD, Chicago, Illinois. Iguazu Falls are the waterfalls of the Iguazu River separating Brazil from Argentina. This picture, taken from the Argentina side, shows one of the 270 discrete falls. In total, Iguazu Falls is wider than Victoria Falls and second in average annual flow to Niagara Falls. It is a candidate for the New 7 Wonders of Nature.