Marina City is a mixed-use residential/commercial building complex occupying the entire city block at 300 North State Street in Chicago, Illinois, on the north bank of the Chicago River, directly across from the Loop. The complex consists of two corncob-shaped 61-story, 587 foot tall residential towers, a saddle-shaped auditorium building, and a mid-rise hotel building all contained on a raised platform cantilevered over defunct railroad tracks adjacent to the river. Beneath the raised platform at river level is a small marina for pleasure craft.
The Marina City complex was designed in 1959 by architect Bertrand Goldberg and completed in 1964 at a cost of $36 million financed to a large extent by the union of building janitors and elevator operators, who sought to turn around the "white flight" exodus of middle-class residents from downtown. When finished, the two towers were both the tallest residential buildings and the tallest reinforced concrete structures in the world. The complex was billed as a "city within a city", featuring numerous on-site facilities including a theatre, gym, swimming pool, ice rink, bowling alley, several stores and restaurants, and of course, a marina.
Each residential tower is an identical 61 floors in height. The bottom 19 floors of each tower is an exposed spiral parking ramp operated by valet with 896 spaces for cars in each tower.