Viewed on a walk to . . . actually I have no idea, but it wasn't long ago. I think it was somewhere on a trip that required a loo break.
Something nasty behind the woodpile? It rather reminded me of a giant Darth Vader head.
But being built, I imagine, well before the late 70's I don't suppose this was a sculptural ode to someone's favourite Star Wars character; more a sensible use of corrugated metal and grey paint.