The Atlantic Forest (subtropical forest of Amazon domain) is one of the most biodiverse ecosystems in South America, with about 60% of its vertebrate fauna being endemic. Several different forest assemblages are found within it, each one of them having its different bird repertoire, which makes it one of the world’s top birding destinations. Once covering most of southeast Brazil, eastern Paraguay and the northeast tip of Argentina, nowadays less than 10% of the original territory still remains as a forest. The Argentine province of Misiones has the world’s largest continuous area of Atlantic Forest, and most of it is formally protected as national and provincial parks (such as Iguazu National Park, Urugua-í and Cruce Caballero Provincial Parks). Most of its original fauna is still well preserved with over 500 species of birds (including toucans, puffbirds, antbirds, manakins, tanagers and more) and many of South America’s iconic neotropic mammals, such as jaguars, tapirs, peccaries, anteaters, monkeys, agoutis and many others. This stage comprises some of the best birding areas and most beautiful landscapes within the Argentine Atlantic Forest and its ecotone with the Campos Grassland, in an ideal amount of time that includes a visit to the spectacular Iguazu Falls.