Brazil's highland forest has been shaped by climate change and Indigenous people for 6,000 years

When you think of a South American rainforest, you probably don't imagine biting winds, heavy frosts and freezing temperatures.

But in the mountains of southern Brazil, that's exactly what you can find.

On this highland plateau, far from Amazonia in the country's coldest region, grows one of the world's most intriguing ecosystems. ...