The River of Spain is a term used to refer to three major rivers in the country: the Ebro, Rio, and Tagus. The Ebro is the longest river in Spain, stretching for over 500 miles from its source in Cantabria to its mouth in the Mediterranean Sea. The Rio is the second longest river in Spain, running for over 300 miles from its source in the Pyrenees Mountains to its mouth in the Atlantic Ocean. Lastly, the Tagus is the third longest river in Spain, running for over 500 miles from its source in the Central System mountain range to its mouth in the Atlantic Ocean. All three rivers are important sources of water for the country and have been used for centuries for transportation, irrigation, and other purposes.