N & W Africa Physical FeaturesOnline version This map identifies major physical features in northern and western Africa. by Angela Lortie 1 Straight of Gibraltar 2 Atlantic Ocean 3 Atlas Mountains 4 Mediterranean Sea 5 Sinai Peninsula 6 Sahara 7 Ahaggar Mountains 8 Tibesti Mountains 9 Sahel 10 Red Sea 11 Nile River 12 Niger River 13 Senegal River 14 Gambia River 15 Arabian Peninsula