Iguazú Falls is one of South America's most extraordinary sights. Vast torrents of water thunder over a horseshoe-shaped natural fault in more than two hundred and fifty separate cascades to create an awe-inspiring spectacle. The falls lie between Brazil and Argentina and while the panorama from the Brazilian side is arguably better, the Argentine side allows you to get closer to the action. However to experience the falls to the full you really have to explore both sides. A visit to the excellent Argentine Visitor Centre provides much useful information about the falls and local flora and fauna.