Hazy, hot, humid. The Mississippi River at flood stage with St. Louis in the distance.
The structure is one of two water intakes for some local municipality’s water supply. Possibly St. Louis, possibly not.
The viewpoint is from somewhere out on the Chain of Rocks Bridge, an old car bridge from the late 1920’s which was where Route 66 crossed the Mississippi River. It’s now part of a trail system along the Mississippi for hiking and biking, strictly pedestrian traffic only.
If I lived in the St. Louis area, I suspect I would be hiking and biking a lot of those trails.