Designated Natural Heritage of Humanity in 1986 by UNESCO, the Iguassu (Brazil)/Iguazu (Argentina) Falls are a spectacular sight. Shared by two countries, the falls are formed by 275 separate waterfalls, ranging in height from 40 meters to 100 meters and are surrounded by 225 thousand hectares of tropical forests with rare and endangered species of fauna and flora. Plenty of activities are available. The Falls can be visited all year long but extended rain is common in September and October.