The Gran Valira (Catalan pronunciation: [ˈɡran bəˈɫiɾə], locally: [ˈɡran baˈliɾa]) is the biggest river in Andorra. It flows through the capital, Andorra la Vella, and exits the country in the south near the Spain–Andorra road border crossing.The Gran Valira is a tributary to the Segre, which in turn is a tributary to the Ebro. It flows into the Segre in La Seu d'Urgell. Its main tributaries are the Valira d'Orient, the Valira del Nord and the Madriu.