1) Sub-Saharan Africa is dominated by huge plateaus, mountains, and valleys. The largest is the Sahara Desert located in northern Africa. 2) Major physical features include broad plateaus, steep escarpments along the edges of plateaus, rivers that plunge over escarpments forming waterfalls, and the Great Rift Valley that stretches over 3,500 miles. 3) Major water systems were influenced by ancient landforms and include lakes like Victoria, Tanganyika, Malawi, Volta, and Chad, as well as the great rivers Congo, Niger, and Zambezi, which provide hydroelectric power potential.