Foz do Iguaçu

Foz do Iguaçu needs 2 days: the Brazilian side of Iguazu Falls, with the panoramic overview of nearly 275 falls, on one, the Devil's Throat from the Argentine side -20 minutes across the border- on the other. April-September is best, with less rain and more manageable flow. It's mid-priced for Brazil. It shares with Puerto Iguazú the widest waterfall system on the planet -almost 3 km across-, a UNESCO World Heritage Site, and it's one of the few cities in the world where you can see the same natural wonder from two different countries on the same trip.