And, to quote Wilbur Cobb: "The walls have TEETH!"
While wandering around the hospital grounds last week, I was pretty chuffed by a number of things. One of those things was a group of trees whose whorls (if-you-will) resembled - quite closely - stylised human eyes. My mind was aware enough to consider that this may be a simple trick of the light, or an odd turn of perception on my behalf, so I photographed them for future consideration. A week later, and they're eyes all right.
I'm quite happy with the concrete "fence" in the second image. Not only did the trees have eyes, they were also situated in a weird Soylent Green/Logan's run-esque part of the hospital.