Saint Paul Union Depot is a historic railroad station and intermodal transit hub in the Lowertown neighborhood of the city of Saint Paul, Minnesota, United States. It serves light rail, intercity rail, intercity bus, and local bus services. It is the eastern terminus for the METRO Green Line light rail line, with the stop located outside the station's headhouse. It is also the Twin Cities' stop for Amtrak, the national intercity railroad service. In addition to rail, Union Depot also serves Metro Transit, Minnesota Valley Transit Authority (MVTA), Jefferson Lines, Greyhound Lines, and Megabus. The headhouse, located at the 4th Street entrance, was designed by architect Charles Sumner Frost and is neoclassical in style. The concourse and the waiting room that extend over the tracks are viewed as a great architectural achievements. The building was added to the National Register of Historic Places in 1974. It is also a contributing property to the Lowertown Historic District. In addition to its transit uses, Union Depot also contains a Hertz rental car location, coffee shop, restaurant, a bike shop, offices, a museum, and loft condominiums. History Original Union Depot There have been two Union Depots in Saint Paul. The first was completed in 1881, and combined the services of several different railroads into one building (hence the "union"; see Union station). In 1888 the old station had its peak year, handling eight million passengers. That year, about 150 trains departed daily. Around this time, the building was remodeled with a taller central tower and other alterations to the roofline. This station burned in 1915. Current building The current structure was started in 1917 but was not completed until 1923 because World War I caused construction to halt for several years. During its heyday, the depot hosted the passenger trains of nine railroads, and more than 20 million pieces of mail passed through the station to the neighboring St. Paul Central Downtown Post Office annually. At its peak in the 1920s, there were 282 train movements daily. The waiting room stood atop nine platforms serving 18 tracks; the eight northern ones closest to the headhouse were stub-end tracks, while the other ten ran through. However, track ownership and trackage rights west of the station meant that most trains operated as though the station was a stub terminal. These trains, when they were intended to continue beyond the station, instead backed up to a