Some wags have pointed out that this building, with its diamond-shape top, looks like a giant pencil sharpener. Built in 1984 as the Smurfit-Stone Building and later known as the Crain Communications Building, it has a slanted top that carves through the top 10 of its floors. In the plaza is Yaacov Agam's Communication X9, a painted, folded-aluminum sculpture. You'll see different patterns in the sculpture depending on your vantage point.
150 N. Michigan Ave., Chicago, Illinois, 60601, USA