Manhattan business days, the influx of commuters increases this number to over 3.9 million, or more than 170,000 people per square mile (65,600/km). 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 are well known, as New York City received a record 62.8 million tourists in 2017, 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 prominent bridges, such as the Brooklyn Bridge;
Brooklyn–Manhattan Transit Corporation Company (IRT), the other private operator of subways in New York City, the BMT remained solvent throughout the Great Depression and showed a profit, albeit small in its last year, until the very end of its transit operations. Several pre-unification BMT equipment have been preserved in various museums. While some of the equipment are operational, others are in need of restoration or are used simply as static displays. Brooklyn–Manhattan Transit Corporation The Brooklyn–Manhattan Transit Corporation (BMT) was an urban transit holding company, based in Brooklyn, New York City, United States, and incorporated in 1923. The system was sold to the