Onitsha, Nigeria

With a population of 1,483,000, Onitsha is a chaotic commercial hub that offers little respite for the average resident. Infrastructure has utterly failed to keep pace with rapid urbanization, leaving the city rife with lawlessness and pollution. Bureaucracy is a persistent headache, as evidenced by the controversy over school fees. And the oppressive, overcast climate only adds to the daily grind. Unless you're a savvy trader willing to brave Onitsha's many challenges, this is not the place for the faint of heart.