Foz do Iguaçu is the Brazilian city on the border of Iguaçu Falls. Foz in Portuguese means the mouth or end of a river and Iguaçu in Guarani or Tupi comes from the words "y", meaning "water" or "river", and "guasu", meaning "big". The city is the 7th largest in the state of Paraná with a population of approximately 258,000 inhabitants. It is approximately 650 km west of the capital of the state, Curitiba, being the westernmost city in that State.