Trees by the River Otún as it passes through the outskirts of the city of Pereira. The river is a short river Otún Colombia, located in the department of Risaralda, born in Lake Otún, and empties into the Cauca River. Go through the city of Pereira. Takes in different protected areas like Los Nevados National Park, the Sanctuary of Fauna and Flora and Ucumarí Park. It is the only source of drinking water for the city of Pereira. Unfortunately this river has a high pollution in the section that is located in the city of Pereira because of the dumping of sewage and industrial.