The IRT 34th Street-Penn Station Line is a subway line in New York City, part of the New York City Subway system. It operates under the Manhattan area, connecting key locations such as Penn Station and 34th Street. This line primarily serves the 1, 2, and 3 trains, providing essential transit options for commuters and visitors. The line is known for its accessibility to major attractions, including Madison Square Garden and the Empire State Building. It plays a crucial role in the city's transportation network, facilitating travel for millions of passengers each year.