The Verdon (French pronunciation:[vɛʁdɔ̃], Occitan:[ˈbeɾðu]) is a 166.5-kilometre-long (103.5 mi) river in Southeastern France, left tributary of the Durance.[1] Its drainage basin is 2,295 km2 (886 sq mi).[2] The Verdon is best known for its impressive canyon: the Verdon Gorge. This limestone canyon, also called the "Grand Canyon of Verdon", 20 kilometres (12 mi) long and more than 300 metres (980 ft) deep, is a popular climbing and sight-seeing area. The name comes from the green appearance of the waters of the river, in the canyon.