the busiest city would either be New York or Hollywood.
Mexico City. With 21.16 million inhabitants (ranked 3rd in the world), it is probably the busiest city in the Americas.
Marseille is the busiest port in France, and the busiest port on the Mediterranean sea, and the third-busiest in Europe.
atlanta
Boston
kochi and thiruvananthapuram (state capital) are the busiest cities of kerala.
new york
Atlanta
Rotterdam
Lagos is a state in NIGERIA, sited in western part of NIGERIA and currently the busiest city and with a pupolation of over 12 million people.
probably miami forida
Manhatin, New York, U.S.A.