8. The Amazon Rainforest, Brazil The Amazon is home to one of the most diverse ecosystems in the world but scientists are still uncovering its secrets.
In 2011, the Brazilian government announced the existence of a completely uncontacted tribe living in the Vale do Javari reservation. It was estimated that about 200 tribe members had been living under just four large thatch-roofed buildings.
A farming population, the newly contacted peoples had been living remotely for centuries in one of the deepest parts of the jungle near the Peruvian border.