I shouldn’t share this location with you . . . but I will (revealed in video above). These are called serviceberries (or June berries, although they are ripe in May here in Atlanta). They look like the love child of a blueberry and cranberry, and they taste like champagne. Here’s another:
If interested, there’s a whole section in my book, Traveling at the Speed of Bike, about free public fruit. I also share some of my secret spots on tours.