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Ipanema Beach in Rio de Janeiro
Iguazu Falls
A two-hour flight from Buenos Aires, the complex of 275 waterfalls known collectively as Iguazú Falls thunders along the borders of Brazil, Argentina, and Paraguay. Considered one of the world's most dramatic natural wonders, this UNESCO World Heritage Site is the perfect ending to this unique mix of experiences, and many visitors consider it the highlight of their South American journey. Eleanor Roosevelt, for one, was so moved in its midst, she famously proclaimed, "Poor Niagara!"
While guided tours typically devote four days to discovering both sides of the falls, with only two left at your disposal, you'll need to focus on Brazil, which, of the three countries that share the site, offers both superior views and the most scenic access to the legendary U-shaped Garganta del Diablo (Devil's Throat) chute that spreads out along a 700-meter-long cliff. Cap off your visit by hiking the surrounding 667-acre rain forest, home to a dizzying array of flora and fauna, including endangered jaguars.
