These are two of my favorite early 20th century phallic symbols in Chicago. The white tower is Mather tower which recently had it's top totally rebuilt. It was actually the worlds tallest for a very short period. The dark green tower with gold highlights in the background is the Carbide & Carbon building. Legend has it that the design was inspired by a champagne bottle. It was also recently renovated to become the Hard Rock Hotel. The picture was taken from the IBM building by Mies van der Rohe.