The Caura River is one of the largest and most pristine watersheds in the world. It maybe the world’s largest extension of intact tropical rainforest. It is the second most important tributary along the right margin of the Orinoco River, known as a black water river due to its dark brown color and low nutrient concentration. Easy to confirm during the excursions, while boats go through these waters, and this amazing jungle all around, keeping the wildlife safe, including at least 679 species of mammals, birds, amphibians and reptiles.