It is a site that is a vast physiographic semicircle belonging to the ultrarifain table of the Numidian sandstone chain with at the base the marno-sandstone flyschs of the Ben Ider sheet. It is characterized by some of the most beautiful forest formations in Morocco with high floristic biodiversity: Zenaie (Quercus faginea), Tauzaie (Quercus pyrenaica), Suberaie (Quercus suber), This site includes the most beautiful deciduous forest in Morocco and one of the most remarkable fauna in Morocco: Zenaie, Tauzaie, Suberaie, Pinède, Cedar, Bogs: Pinewood (Pinus pinaster ssp maghrebiana), Cedar forest (Cedrus atlantica).