The Ibera Wetlands are the second-largest wetlands in world after the Pantanal in Brazil. The ecological preserve is home to many iconic South American animals, including anacondas, armadillos, caimans, capybaras, howler monkeys, the ostrich-like rhea and more than 350 rare and endangered bird species. This boggy area in northern Argentina can be explored by foot, on horseback or by kayak.