Big Apple
"The Big Apple" was popularized as a name for New York City by John J. Fitz Gerald in a number of horse-racing articles for the "New York Morning Telegraph" in the 1920s. The earliest of these was a casual reference on 3rd May, 1921:
Architecture of New York City
New York has two main concentrations of high-rise buildings: Midtown Manhattan and Lower Manhattan, each with its own uniquely recognizable skyline. Midtown Manhattan, the largest central business district in the world, is home to such notable buildings as the Empire State Building, the Chrysler Building, Citigroup Center and Rockefeller Center. Lower Manhattan comprises the third largest central business district in the United States (after Midtown and Chicago's Loop). Lower Manhattan was characterized by the omnipresence of the Twin Towers of the World Trade Center from its completion in 1973 until its destruction in the September 11 attacks, 2001.