What is wadi ziz?

The Ziz or Ziz Gorge (Berber languages: Iɣerm n Dades - 'Dades Valley', Arabic وادي زيز Wadi Ziz) is a rugged wadi that snakes north from the Tafilalt oasis into the High Atlas in southern Morocco. One of the largest wadis in North Africa, Ziz flows along an 80 km long corridor and reaches approximately 30 km to 20 km east to west.