Millennium Station is a major commuter rail terminal in the Loop, Chicago. It is the northern terminus of the Metra Electric District to Chicago's southern suburbs, and the western terminus of the South Shore Line to Gary and South Bend, Indiana.
Located under Millennium Park, the terminal is a stub-end station and was established in the 1800s by the Illinois Central Railroad and has gone through several re-configurations. Most recently, it was rebuilt in the early 21st century and is owned by Metra through its operating arm, the Northeast Illinois Regional Commuter Railroad Corporation. Not counting commuters on the South Shore Line, over 18,000 people board Metra trains at Millennium Station each day. During peak periods, trains leave the terminal as frequently as twice a minute. It is the third-busiest train station in Chicago.
Wikipedia https://en.wikipedia.org/wiki/Millennium_Station
Coordinates 41°53'5.138" N -87°37'24.042" E