I would love to visit New York City someday.  Have you ever been?
New York, often called New York City or simply New York, is the most populous city in the United States.
That's what I hear, but I'd still love to visit.  What should I do there when I go?
it has an estimated 2016 population of 8,537,673 distributed over a land area of about , New York City is also the most densely populated major city
What should this tourist do if I go there?
its A global power city, New York City has been described as the cultural, financial, and media capital of the world, and exerts a significant impact upon commerce, entertainment, research, technology, 
Maybe there's nothing for a tourist to do in NYC.  I guess I won't go.
interestingly, five boroughs – Brooklyn, Queens, Manhattan, The Bronx, and Staten Island – were consolidated into a single city in 1898