Commuters walking in Penn Station in Manhattan, New York, during Friday morning rush hour. September 13th, 2024.  Penn Station is the busiest railway station in North America. Amtrak, New Jersey Transit (NJT), and the Long Island Railroad (LIRR) use 21 tracks in Penn Station to serve more than 500,000 daily passengers and 1,000 weekday trains. 

Photograph by Eileen Ko.