[kkajanaku]

Under this definition Luanda would make a great candidate. The most expensive city in the world, ahead of Hong Kong, Zurich, and Singapore on Mercer's Cost of Living ranking. A two bedroom apartment will cost on average $6,800 per month, while the GDP per head is just $7,700 per year. It is also on track to become a megacity by 2030, full of glittering spires of glass and steel.

[19eightyfour]

That's totally true as well. I didn't even think of that last night. People often think Asian megacities or US megacities as the most expensive. But that's not true. It's actually cities in Africa.

I guess another valid point is the problems African cities are dealing with are sort of indicative of what's projected that most mega cities will deal with in future. A huge income gap, lots of overcrowding and some kind of constant security and resource problems.