Rivers
Ebro: Longest river in Spain (900 km) flows through Zaragoza.
Duero: This golden river starts in the autonomous region of Castile and Leon and flows through Portugal in the Atlantic Ocean.
Tagus:
This river flows into the Atlantic Ocean at Lisbon. The river flows
through the city of Toledo and is about 1000 kilometers long.
Guadiana: Flows through the cities of Merida and Badajoz (Extremadura), and forms downstream the border between Portugal and Spain.
Guadalquivir: Andalusian river flows through Córdoba and Seville and is about 600 kilometers long.
Júcar: Passes through the province of Cuenca, Albacete and Valencia. Ends after 500 km in the Mediterranean sea.
Segura: A slightly smaller river that flows through the city Murcia. The river is known for its floods.
Southern rivers: including several short rivers south of the Sierra Nevada.