The Sestao River is a small river located in the Basque Country of northern Spain. It flows through the municipality of Sestao and eventually joins the Nervión River, which is an important waterway in the region. The river is known for its industrial surroundings and has played a role in the area's economic development. Historically, the Sestao River has been influenced by the industrial activities in the region, particularly during the 19th and 20th centuries. The river's banks are lined with remnants of factories and shipyards, reflecting the area's maritime heritage. Today, efforts are being made to improve the river's environment and promote recreational activities along its banks.