8) Libreville (Gabon)
Libreville is the capital and the largest city of Gabon. It is home of almost half of the population of Gabon. It is a clean city with good paved roads. Libreville looks like a European city.
7) Accra (Ghana)
Accra is the capital and the largest city of Ghana. It is centered on British, Danish and Dutch forts and their surrounding communities. Accra is relatively clean, but the city tends to accumulate filth.