You have to say New York in this. I love a lot of places, but there is no place I can think if that even compares to the authoritive figure NYC has around the world. Just walking the streets and experiencing the energy, the attitude, the concentration of wealth, the diversity, the significance and the authority gives it this feeling that you never, and will never, feel in any other world city.

Walk down Park Avenue and tell me there's no energy. Look up at the iconic high-rise canyons casting dark shadows on the below streets, look up in the nighttime sky and see the Empire State Building lights lighting up the clouds under a full moon.

Ahhhh, I can't think of a city that fits the Greatest City in the World bill better than New York City.