When the twin towers of Marina City were completed in 1964, they had three distinctions: the world’s tallest residential and concrete buildings plus the first to use tower cranes to build the 65 story, 587 foot structures. When you stare up at the circular honeycomb or corncob shaped buildings, it is odd to see that the first 19 floors are dedicated to parking. The remaining floors are condominiums with spectacular views of the Chicago River and The Loop.