One of the tours I most enjoyed on the Brazilian side of the Falls was “Poço Preto Trail”, an ecologist-guided safari with river bathing included. Spirit of adventure is a basic requirement, and you should not be afraid of water so you can make the most of it.
Tierra Del Fuego is an archipelago in the southernmost tip of South America, formed by the main island an several small islands. It is separated from the continent by the Strait of Magellan and Cape Horn at the end. That is also the name of the park, because when the ships sailed they saw spots of light from the fire made by the Yámanas, the local residents in the 19thcentury.