The lost World's Fair Subway line in New York City has a rich yet fleeting history. Constructed for the 1939-1940 World's Fair held in Flushing Meadows-Corona Park, Queens, the line served as a direct route for fairgoers from Manhattan to the fairgrounds. However, its legacy was short-lived, as it ceased operations shortly after the fair's conclusion. Despite efforts to repurpose the line for public transit, logistical challenges and financial constraints led to its abandonment. Today, remnants of this once-prominent subway line linger beneath the city streets, serving as a nostalgic reminder of a bygone era of innovation and grandeur.