Lake Point Tower

Before Mies decided that curves were altogether too pleasing to the eye and had to go, Mr. "Less is more" designed a building very much like this one, which was executed many decades later after his death by two of his proteges.

It's the only building on the lake side of Lake Shore Drive. Chicago has very strict protections about building on the lakefront, so it's likely to remain that way. I like this closeup view, with the curves and lines almost abstract.