Jardins des fraternités ouvrières in Mouscron, inspired from a picture found here : https://laforetnourriciere.org/les-fraternites-ouvrieres/ . My own pictures were not useful, but I highly recommend to visit it , it's in Belgium, at the border with France (Lille/Roubaix). The founder passed away several years ago, the volunteers are doing what they can with limited time so it's looks even more like a jungle.

Contains lots of trees, making it easy to solve

Have fun !