Argentina is a stunning country, its huge length you can see very different nature within one country.
The Iguazu falls are absolutely stunning.
Salta, capital of the eponymous province.
Bus trip to Humahuaca
Ushuaia claims is the southernmost city of the world, yet it is only as South as e. g. Northern Germany is North, its climate and light thus felt quite like home and the impressive mountains gave it a Swiss feel.
Rich South Americans go there for skiing, affluent Europeans to embark on a trip to Antarctica.
Perito Moreno glacier
The Perito Moreno glacier is a stunning spectacle, it is a calving glacier: ice collapses frequently, the glacier is sighing and cracking.