In the extreme of the province of Misiones, in the north of Argentina, and surrounded by the leafy parana jungle vegetation, there are Argentinian and Brazilian Iguazú National Parks, with their more than 270 waterfalls. In the guaraní language, “Iguazú” means “big water”; this is how the aborigine ,who still inhabit the area, named the imposing waterfalls of the iguazú river. The waterfalls represent a unique natural spectacle in the world, and were named World Heritage by the UNESCO. The river and the waterfalls are the natural boundary between Argentina and Brazil and they form, together with Paraguay, a boundary post of three frontiers.