Lake Iseo or Lago d'Iseo is the fourth largest lake in Lombardy, fed by the Oglio river. It is in the north of the country in the Val Camonica area, near the cities of Brescia and Bergamo. Northern Italy is renowned for several stunning lakes. Lake Iseo remains one of outstanding natural beauty, with its lush green mountains surrounding the crystal clear lake. There are several medieval towns around the lake, the largest being Iseo and Sarnico. A notable tourism sector has emerged.