Explored a bit off trail, found ribbons marking this spot. Someone else had noticed it.
Nearby (the split-wedged rock is in the background) was this standing stone. Note the drill holes.Personally I am almost convinced that split-wedged rocks are deliberate doorways to the underworld. I don't have much evidence for this, it just seems like a lot of bother when the rock is first split deliberately, then wedged; unless the entire construction was of one purpose - to create an open split.