The Iberian River is a river system located in the Iberian Peninsula, which includes Spain and Portugal. The three main rivers of this system are the Ebro, Tagus, and Douro. The Ebro is the longest river in the Iberian Peninsula, stretching for over 500 miles. The Tagus is the second longest river in the Iberian Peninsula, and it flows through both Spain and Portugal. The Douro is the third longest river in the Iberian Peninsula, and it is the main river of northern Portugal. All three of these rivers are important sources of water for the region, and they are also popular tourist destinations.