The Tagus River is the longest river in the Iberian Peninsula, flowing through Spain and Portugal. It stretches about 1,007 kilometers (625 miles) and is known for its beautiful landscapes and historical significance. The river starts in the Sierra de Albarracín mountains in Spain and eventually empties into the Atlantic Ocean near the city of Lisbon. Along its journey, the Tagus passes through several cities, including Toledo and Lisbon, where it plays a vital role in local culture and economy. The river is also famous for its picturesque views, making it a popular spot for tourists and locals alike.