What can you say. A totally mind boggling natural wonder. The scale is just immense. One of the most impressive and beautiful things I have seen in my life.
The Iguazú Falls consist of 20 larger and 255 smaller waterfalls over a length of 2.7 kilometers. Some are up to 82 meters, the majority are 64 meters high. The amount of water at the falls varies from 1500m³/s to 10500m³/s. The border between Argentina and Brazil runs lengthwise through the falls. Since most of the falls are in Argentina, the larger panoramic view is possible from the Brazilian side. The falls are separated from each other by several larger and smaller islands. Of the 2700 meters, no water flows for about 900 meters. The main waterfall (or the main waterfall system) is colloquially called Garganta del Diablo (Spanish) or Garganta do Diabo (Portuguese) or "Devil's Throat" and is a U-shaped gorge 150 meters wide and 700 meters long. There is a 600-meter-long walkway on the Brazilian side to the lower end, and a 1,000-meter-long walkway leads from the Argentinian side to the upper end. However, when the water level is high, visibility is limited by spray.