And yet Detroit has pretty much the perfect weather for growing apples. I'd imagine there have to be old trees all throughout the city from back when there was money, given that they can easily produce fruit for 100+ years and can go decades with little to no maintenance.
Absolutely right (to whoever downvoted you) - go explore! I've trekked with my bicycle to forgotten orchards and overgrown corners of parks and riverbanks, and found plenty.
Even roadsides are laden with wild produce. Some less-trafficked verges are quite OK for foraging.
