By William W. Boyington, Gothic Revival.
The Chicago Water Tower is a 182.5-foot (56 m) tall former water tower in Chicago, Illinois. Inside was a 138-foot (42 m) high standpipe, which housed a large water pump. In addition to being used for firefighting, the pressure in the pipe could be regulated to control water surges in the area.
From Wikipedia, CC BY-SA 4.0.
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