In the Northwestern part of Amazonas State, not far from the Orinoco, you can visit the Autana mountain or Mountain of Life. The mountain is made up mostly of horizontal sandstone shields, mixed with karst, which is quite a strange thing, as karst shows up mostly in limestone formations.
The Autana rises only 1250 metres above sea level, but it looks pretty impressive as the jungle around is rather flat. This is the beginning of the amazing Guayana shield, which stretches for hundreds and hundreds of kilometres towards the East. To the West and North, going over the Orinoco, you have lands that belong to the Llanos.
The Piaroas are some of the main native American groups still living in this area. They speak a language that is completely unrelated to any other language but one.