The Iguazu National Park, located in the north western corner of Misiones, in the triple frontier between Paraguay, Brazil and Argentina, was created in 1934. Declared Patrimony of the Humanity by UNESCO, in 1984, and with an extension of almost 67.000 acres, the Iguazú National Park lodges the famous Iguazu Falls and the rainforest with more than 2000 vegetal species and native animals. It is the home of 450 bird species and 80 mammals, among them, the yaguareté, the largest feline in America, also guacamayos, coatíes, toucans, monkeys, tapires, hummingbirds, and multicolor butterflies. The Iguazu River is born in the south of Brazil and flows more than 1.300 kilometers before it falls into an unevenness of 80 meters that forms the Iguazu Falls, a semi circle of about 3 kilometers wide where the steam forms clouds that, reflected by the sun, turn out into amazing rainbows. Among the different falls, the Union is the best known because it originates the spectacular “Garganta del Diablo” (Devil's Throat) and because it marks the boundary between Argentina (78% of the Falls) and Brazil (22% of the Falls). The name of the Iguazu Falls comes from the Guaraní language and means “big water”. They are formed by 270 cascades of up to 82 meters and three kilometers wide that can be visited thanks to the footbridges and paths that take visitors from one fall to the other.