The New York City Subway is a rapid transit system in Manhattan, Brooklyn, Queens, and the Bronx in New York City. Opened on October 27, 1904, the New York City Subway is one of the oldest public transit systems in the world, the most heavily used, and the system with the most stations. The subway system consists of 27 interconnected lines that serve the boroughs of Manhattan, Brooklyn, Queens, and the Bronx with more than 470 stations. With its distinctive mosaic-tiled stations, diverse series of lines, and iconic signage, the subway has become a symbol of the energy and vitality of New York City. As the largest and busiest subway system in the United States, the New York City Subway plays an essential role in the daily lives of millions of New Yorkers, offering a complex web of routes that facilitate efficient and accessible transportation throughout the bustling metropolis.