The Calle-Calle River is a significant waterway located in the southern region of Chile, specifically in the Los Ríos region. It flows through the city of Valdivia and is known for its scenic beauty and ecological importance. The river is approximately 40 kilometers long and is a vital part of the local ecosystem, supporting various species of fish and wildlife. The Calle-Calle River is formed by the confluence of several smaller rivers, including the Cahuil River and the San Pedro River. It eventually empties into the Valdivia River, which leads to the Pacific Ocean. The river is popular for recreational activities such as kayaking and fishing, attracting both locals and tourists.