The Tajo River, known as the Tagus in English, is the longest river in the Iberian Peninsula, flowing approximately 1,007 kilometers. It originates in the Sierra de Albarracín mountains in Spain and travels through cities like Toledo and Lisbon, where it empties into the Atlantic Ocean. The river plays a crucial role in the ecosystems and economies of the regions it traverses. It supports agriculture, provides water for urban areas, and is a popular destination for recreational activities such as fishing and boating. The Tajo is also significant for its historical and cultural importance in both Spain and Portugal.