Jemaa el-Fina market in Marrakech, Morocco. You may not have noticed it, but many African cities are expanding faster in land area than they are in population.

African Cities Are Growing, But Ironically Becoming Less Dense; Why This Matters

A sprawling city means that distances between neighbourhoods are long and transport costs are high. That ends up acting as a brake on the ability of cities to reap the benefits of growth.