Queens is the largest in area and the second most populous of the five boroughs of New York. The borough of Queens is coterminous with Queens County. It is home to New York City's two major airports (John F. Kennedy and LaGuardia), the New York Mets baseball team, the USTA Billie Jean King National Tennis Center (home of the annual U.S. Open, Silvercup Studios, Flushing Meadows Corona Park, and Queens Center (the most profitable per-square-foot mall in America). The borough of Queens is furthermore the most ethnically diverse county in the United States. As of the 2005 American Community Survey, immigrants comprise 47.6% of its residents.[1] With a population of 2.2 million it is the second most populous borough in New York City (behind Brooklyn) and the tenth most populous county in the United States. The 2.2 million figure is the highest historical population for the borough. [2] The borough is often considered one of the more suburban boroughs of New York City. Neighborhoods in eastern Queens have a look and feel similar to the bordering suburbs of western Nassau County. In its western and central sections, however, Queens is home to many urban neighborhoods and several central business districts. Long Island City, on the Queens' waterfront across from Manhattan, is the site of the Citicorp Building, the tallest skyscraper in New York City outside of Manhattan. Due to it's large size, Queens has a variety of distinct neighborhoods.^[1]