^ Quality post, Plankton
That water tower makes a very interesting contrast to the blank facade of the building behind. At ground floor level, I counted twelve turrets on a building smaller than many regular houses. Also, the corner turrets have turrets on them - so there is some justification for the word "overbuilt" in your attached explanation.
It was interesting to read about the why and how of the tower and its survival, and I liked the unexpected connection to your obsessi -er- your hobby and the Joliet Prison.
Great drone footage of the prison too!