I used to visit my aunt and uncle in North Chicago (for weeks), near Waukegan. The town had the foul stench from Abbott Laboratories from their vitamins or something. I was an odor you never forget!
Come on, that was the smell of money. Actually, the smell came from the digesters that made the precursors for Liposyn, the IV nutritive. "The raw materials" came in the rail tanker cars from the plants in Iowa. Liposyn has saved hundreds of thousands of lives, maybe millions.
I walked over the tracks every day to R1A. Usually it smelled like strawberries or vanilla, occasionally it smelled like the most heavenly chocolate.
'Course, it never compared to the aromas from Partner's Barbecue just north on Sheridan, man, did they do ribs. Great big cardboard boxes of joy. There was no popcorn in the world like it.