Aquifers are intriguing. They are so large a person has a hard time realizing over a period of time how the land is affected when they are tapped. Subsidence is hard to wrap your head around.
San Joaquin Valley is a good example.
https://www.mantecabulletin.com/news/local-news/san-joaquin-...
https://www.usgs.gov/media/images/location-maximum-land-subs...