Near Philadelphia(USA) is a food forest that was started in the 1920's by John Hershey. Although it was broken up in urban sprawl, many of the trees survive today in empty lots, backyards, and by parking lots.
There are pecans, walnuts, persimmons, apples, and many more, all growing without maintenance. It is thought to be the oldest living food forest in the USA.
📰 https://www.shelterwoodforestfarm.com/blog/2018/10/17/exploring-americas-oldest-food-forest
📺 https://m.youtube.com/watch?v=qQZTmb_1gk4