Michigan Central Station

The construction of Michigan Central Station, or MCS, would be a monumental undertaking. Located at the junction of 15th and Dalzelle Streets, the station would consist of two buildings: a three-story train depot, and an 18-story office tower, making it the tallest railroad station in the world. Passengers would arrive by streetcar or carriage and enter a soaring waiting room flanked by Corinthian columns, purchase a ticket, and board their train via an underground tunnel that led to the tracks behind the station. Restaurants, a newspaper stand, a drugstore and a barber shop provided for every need that a travel might have.
This article has a fantastic set of pictures telling the detailed story!