In Deep:
That open circle with the line through it has the value of "3" and those 2 rocks just above it look to have been placed there by the hand of man. The little stone on the right looks like it's in the shape of a small dog with it's head butted against the snout of, what could be a snake or turtle. (that's the larger rock on the left) Those 2 stones form an opening you can see through, but may not be a typical hoyo setup.
At the 1 to 2 o'clock position from that little circle is a large stone shaped like the drumstick of a chicken (lol) The upper end seems to have been shaped to fit into the notched overhang of that larger rock.
Look closer, but be very careful. See if there is an opening behind the chicken drumstick, but before you try to move it, check very closely to see if it might be a death trap or, in the least, a leg breaker. I believe that some group, set up rock falls to injure folks and not necessarily KILL them. A bad injury would effectively take out at least 3 people or maybe more. No. 1, the injured guy and at least 2 others to help him back to civilization for care. This last is just my own thoughts on the matter. Leg-breakers and head-knockers would be a hell of a lot easier and simpler to rig up on a trail..........and especially at an important stopping point or storage site. In Viet Nam, the VC would use little "toe-poppers" to slow down their enemy...........US. LOL