Back in 1886, the Statue of Liberty was the tallest structure made out of Iron and the seven spikes on the crown represent the seven continents and oceans of the world.
The Mohawk ironworkers are the reason for almost every other skyscraper that you see in New York due to their tribal teachings and talents to withstand pressure.
NYC's nickname obtained its spotlight in 1920 when a journalist John J. Fitz Gerald titled it’s article ‘Around the Big Apple’ referring to New York City.