Iguazu Falls, are waterfalls of the Iguazu River located on the border of the Brazilian State of Paraná and the Argentine Province of Misiones. The falls divide the river into the upper and lower Iguazu. The Iguazu River starts at the city of Curitiba and runs for the most part of the course in Brazil and at the end at the border of Brazil and Argentina.
The waterfall system consists of 275 falls along 2.7 kilometres (1.7 mi) of the Iguazu River. Some of the individual falls are up to 82 metres (269 ft) in height, though the majority are about 64 metres (210 ft). The Devil’s Throat (Garganta del Diablo in Spanish), a U-shaped, 82-meter-high, 150-meter-wide and 700-meter-long (490 by 2300 feet) cataract, is the most impressive of all, and marks the border between Argentina and Brazil. The Argentine side comprises three sections: the upper falls, the lower falls, and the Devil’s Throat.
Two-thirds of the falls are within Argentine territory. About 900 meters of the 2.7-kilometer length does not have water flowing over it. The edge of the basalt cap recedes by 3 mm (0.1 in) per year. The water of the lower Iguazu collects in a canyon that drains in the Paraná River, a short distance downstream from the Itaipu Dam. The junction of the water flows marks the border between Brazil, Argentina, and Paraguay. There are points in the cities of Foz do Iguaçu, Brazil, Puerto Iguazú, Argentina, and Ciudad del Este, Paraguay, which have access to the Iguazu River where the borders of all three countries can be seen, a popular tourist attraction for visitors to the three cities.