Seems there's any number of things we can share outside of the Uncensored threads...
This is a picture of the Chicago River on St. Patrick's day, 2019. Those two corncob looking buildings are known as Marina City. My father was a Superintendent on those for a while in the early '60's until he started his own construction company.
I read somewhere that due to glaciers that receded some 10,000 years ago that left soft pockets in the earth, Chicago is now sinking at a rate of 4" every 100 years. While the buildings may remain unaffected...or not...the streets, and certainly underground utilities are going to suffer them impacts of all that. The City was mostly a swamp, not unlike DC, and the they actually raised ground level 4' back in the mid-1800's. That doesn't seem to be holding up. They also reversed the flow of the Chicago River in 1900 to stop the flow of industrial waste into Lake Michigan...an engineering move that is under present day scrutiny for other reasons, such as the migration of invasive species of fish, and there are discussions of actually returning the river to it's natural flow.