Iguassu Falls (Portuguese: Cataratas do Iguaçu, Spanish: Cataratas del IguazúSAMPA [iGwa'su]) are waterfalls of the Iguaçu River located on the border of the Brazilian state of Paraná (in the Southern Region) and the Argentinian Province of Misiones, and are shared between the Iguaçu National Park (Brazil) and Iguazú National Park (Argentina). Most of the falls are within Argentinian territory, but from the Brazilian side a more panoramic view is obtained.
The name comes from the Guarani words í (water) and guazú (big).