The famous Patagonia region of Argentina has some amazing hiking trails, but the very best would have to be the Fitz Roy hike!
This entire trek is full of great scenery, and at the end you get to see a spectacular blue glacial lake called the Laguna De Los Tres, which sits at the foot of Mount Fitz Roy, one of the most impressive and iconic peaks in South America.
It’s a challenging hike with plenty of distance and elevation gain, but most people will still find it very doable. And even if you don’t go all the way to the lakes, you can still get amazing pictures of the mountains at the mirador (viewpoint) after only a moderate amount of hiking from the town of El Chalten.