The greatest sight in South America? When looking out on over 250 waterfalls cascading over precipices, all strung along 3km of jungle-clad cliffs, it’s hard to disagree. In fact, it’s difficult to do anything other than give in to the hypnotic white-foaming roar of the great cataract. And Brazil is the place to gawp at Iguaçu’s full panorama: compared to Argentina, the widest of widescreen views are on offer here.The perfect way to see the falls is to spend a day on each side of the border: the jungle walksand perspectives of the cascades vary greatly on Brazilian and Argentinian soil. Two days may sound a long time to watch some water jumping off a cliff. By the end of it, we guarantee, you’ll be wishing you had longer.