Chas, I did not mark EVERYTHING, but just what I thought was important. I apologies for not adding a caution to removing the plug. SO, be careful, but I doubt it will give you trouble. I took the skull I saw as a "burial sign" not a immediate death sign. Regardless, there are more and plenty of S/S on that large rock area near the "plug". Animal resting, tired animal, roman soldier, skull, woman, man, phenix, bear, dog, the multiple turtles at different angles, jaguar, the large owl with heart chest, OTHER shadow profiles in the back, the large profile that uses the white eye-catcher for an EYE(has its mouth open), The large bird with round eye on the left, the large bird head looking left, (where Dog, TTH wrote "compass on top of), the large hand, the large heart next to the "map". so on and so forth. blah blah blah blah blah, send me a picture of the empty space.
Dog, TTH good catch on the bird, I saw it after I finished my first mark up, was hesitate to update my mark up. It's a nice one isn't it...shows how they use the entire canvass and everything is in "play". Negative or empty space is not excluded.
SS, I think you're asking me how I came up with the "sign". The cross was just added for drama and to insure Chas saw what I was talking about..."buried." The coffin is visible, I believe some of those surrounding rocks where previously completing the head part, but where long ago moved by traffic. I am not exactly saying this is where treasure is or was located, but I would not be surprised if there was something there...but most likely it is part of the "sentence" meaning "buried" in the long line of clues of the area.
Chas, your map is also the head of a OWL. Meaning pay attention to sun, shadow, shapes, everything in a 360 degree around the map rock for about 75 feet. This is the center of your search area. It is also the head of Christ when viewed at a precise angle. Everything was placed or altered to fit the message and theme of the area. I had more info on here before I accidentally delete it. Maybe I'll get motivation later.
Wish you the best.