The Marina City also known as “the corn cob” or “corncob towers” is one of the most iconic skyscrapers in the Chicago city. It was built as an urban experiment to create a “city within a city” living places close to work for the middle-class Chicagoan in the downtown of Chicago. Beside it interesting history, the corncob pattern of the Marina City is the most important point that make it outstanding among skyscrapers in Chicago. This uniqueness is created from the combination between the forms of curved balconies and circular structure of this architectural sites.