311 South Wacker was also the tallest building in the world known only by its street address, until it was surpassed in height by New York's 432 Park Avenue in 2015.

[3][4] The lower level of the winter garden was designed for a possible connection via underground passageway to Chicago Union Station.

It used to have palm trees, still has a fountain, and is supported by a steel structure influenced by the Chicago "L" tracks and bridges.

This park is used to host local farmer markets, musical events, and various art and cultural festivals.

[7] This land was originally to be occupied by two companion towers that were never developed due to office market conditions.