Istanbul, Turkey
Istanbul is such a diverse city that it’s almost impossible to split it up into definable districts. The only real distinction that can be made is between the European and Asian sides, which are separated by the Bosphorus Strait. Stretching from the Black Sea, straddling across the Bosphorus, touching the Sea of Marmara, Istanbul, with an estimated population of between 10-13 million, has become a city of unlimited scope.