Mapocho is a river that runs through the city of Santiago de Chile. It is one of the main rivers in Chile, and its source is located in the Andes mountains. The river divides the city into two parts and has played an important role in the history and development of the city. In the past, the river was heavily polluted, but efforts have been made to clean it up in recent years. Today, the Mapocho River is a popular spot for recreational activities, including running, cycling, and walking. Additionally, the river serves as a symbol of unity and pride for the people of Santiago, as it connects the city to its natural surroundings.