Los Llanos (meaning the flat plains) is a vast tropical grassland plain situated at the east of the Andes in northwestern South America (Colombia and Venezuela). Its main river is the Orinoco.
Despite poor climate, during the colonial era, llaneros (similar to the gauchos of the pampas) herded millions of heads of cattle here.
The area slopes gradually away from the highland areas that surround it; elevations in the llanos never exceed 200 meters.
The colourful river in this video is called Caño Cristales, a very special river which is often called "The most beautiful river in the world".