Buenos Aires, a city formed by hundreds of thousands of immigrants from three continents. READ

New Orleans, the most un-American city in the USA. Since being founded by the French in 1718, it has assimilated European, African and Caribbean cultures. READ

Marseille, the second-largest city in France, is the most multicultural city in the country. READ

Rotterdam is Europe's largest port and one of its most diverse cities. Its population of around 650,000 includes some 180 nationalities. READ