Iguazú National Park

O n the border between Argentina and Brazil, the Iguazú Falls — the largest series of waterfalls in the world — are one of South America’s leading attractions. Victoria Falls, in southern Africa, has the world’s largest single curtain of water, but the Iguazú system is both more extensive and easier to see. On the Argentine side, there are approximately 4 miles of metal walkways, with dozens of viewpoints. Closest to the main entrance are the Upper Circuit and the Lower Circuit paths, each of which takes about 90 minutes to complete at a leisurely pace. On the Upper Circuit there are places where you can stand a few feet from where the river slides into the abyss, while on the Lower Circuit it is possible almost to reach out and touch the thunderous Bosetti cascade. To get to the Argentine side of the falls, fly into the uninspiring city of Puerto Iguazú, a two-hour nonstop flight from Buenos Aires.