I found a cache of them growing wild near one of the retention ponds in my very suburban boring neighborhood. It was like finding a fairy in my garage.
Im talking hundreds of bushes.
Ahh, gotcha! My dad found a wild blackberry bush one time. Went back later with a bowl and ended up grabbing enough to make us a pie, which was absolutely delicious. Enjoy!
Sometimes Nature is just freaking cool. The bushes we found were along a walking path that meandered through a meadowy area of our also very suburban neighborhood.