Although I don't read as many magazines as I used to these days, one of the ones I still get fairly regularly is Fortean Times. In it, there are often photographs of things in nature which sort of look like other things -- usually a face in some natural feature like a tree trunk or boulder. They call these things "simulacrum", defined on dictionary.com as "a slight, unreal, or superficial likeness or semblance".
On this somewhat unseasonably cold and wet Maine day, I walked down to the pebble beach below the house we're renting and spent some time walking on and looking at rocks. As I was pondering some rocks in the tidal zone, I noticed this:
See the face peering back? It almost looks like someone trapped among the rocks. At least, it does to me. -- PL