Which city is known as 'little Apple' ?

Manhattan

Manhattan is one of the five boroughs of New York City, in the state of New York in the United States. The borough is coterminous with New York County, founded on November 1, 1683 as one of the state's original counties. The borough consists mostly of Manhattan Island, bounded by the East, Hudson, and Harlem Rivers, and also includes several small adjacent islands and Marble Hill, a small neighborhood on the mainland.

Manhattan is often said to be the economic and cultural center of the United States and hosts the United Nations Headquarters. Anchored by Wall Street in the Financial District of Lower Manhattan, New York City has been called both the most economically powerful city and the leading financial center of the world, and Manhattan is home to the world's two largest stock exchanges by total market capitalization: the New York Stock Exchange and NASDAQ. Many multinational media conglomerates are based in the borough. Historically documented to have been purchased by Dutch colonists from Native Americans in 1626, for the equivalent of US$1050,Manhattan real estate has since become among the most expensive in the world, with the value of Manhattan Island, including real estate, estimated to exceed US$3 trillion in 2013.

New York County is the most densely populated county in the United States.It is also one of the most densely populated areas in the world, with a census-estimated 2014 population of 1,636,268 living in a land area of 22.83 square miles (59.13 km2), or 71,672 residents per square mile (27,673/km2). On business days, the influx of commuters increases that number to over 3.9 million, or more than 170,000 people per square mile (65,600/km2). Manhattan has the third-largest population of New York City's five boroughs, after Brooklyn and Queens, and is the smallest borough in terms of land area.

Many districts and landmarks in Manhattan have become well known, as New York City received a record 56 million tourists in 2014,and Manhattan hosts three of the world's 10 most-visited tourist attractions in 2013: Times Square, Central Park, and Grand Central Terminal.The borough hosts many world-renowned bridges, such as the Brooklyn Bridge; skyscrapers such as the One World Trade Center, one of the tallest skyscrapers in the world;and parks, such as Central Park. There are many historically significant places in Manhattan: Chinatown incorporates the highest concentration of Chinese people in the Western Hemisphere,and the Stonewall Inn in Greenwich Village is considered the birthplace of the modern gay rights movement.In addition, the city of New York was founded at the southern tip of Manhattan,and the borough houses New York City Hall, the seat of city government.Numerous colleges and universities are located in Manhattan, including Columbia University, New York University, and Rockefeller University, which have been ranked among the top 35 in the world.