The most important rivers in Spain are the Miño, Duero, Tajo, Ebro, Guadiana, Guadalquivir, Jucar, and Segura. The Duero is born in Soria and flows 895 km before emptying into the Atlantic Ocean near Porto, Portugal. The Tajo is the longest river in the Iberian Peninsula, flowing west across central Spain. The Ebro is the largest and second longest river in the peninsula, passing through several provinces before reaching the Mediterranean Sea.