A Definitive Ranking of the Top 10 Sights in the World

The Guarani name for the point where Río Iguazú plummets over a plateau just before its confluence with the Río Paraná is a great understatement: Big Water. Big? These falls are mind-bogglingly mighty: tourist boats that ply the foaming plunge pools below look like matchsticks. Boardwalks also get you thrillingly close. The whole thing is glimpsed through a stretch of subtropical rain forest, forming a 55,000-hectare national park replete with wildlife, including jaguars.