When I saw this in a country lane near a farm in Treorchy, Rhondda Valley, South Wales, UK. I just had to stop and take a photograph. It's obviously taken many years to get like this. I presume the tree will eventually swallow the whole box!
Camera: Leica M6 ttl(1999) with Voigtlander Ultron 28mm F2 lens (manual focus)
Film: Fuji Color Industrial ASA 100