Mention London, Rome, or New York, and people immediately conjure up Big Ben, the Colosseum, the Statue of Liberty. Beijing, Cairo, Mumbai? Check. They’ve heard of them. Megacities, the ones with lots of history, lots of people, and an oversized impact on the economy and culture, tend to be well-known. 

Fewer people may know much about Addis Ababa, Dhaka, Lagos, or São Paulo — yet many would recognize the names. But who knows or has been to Darkhan, Mongolia or Santa Fe, Argentina or Boké-Kamsar in Guinea?