AIORIA:
Going back to that boulder with the deadfall on it. That "X" could mean "10" or stand for 4 V's, where "V" equals "5" . Add those values together with the circled dot whose value is "3", you will have values of 13 or 23. These could be in feet, meters, or Vera's. Now, does that mean depth or distance? I could see 13ft. deep or even 23 ft. deep, but I don't believe the people who hid the goodies would have dug a pit 13 meters or 23 meters deep. That is equal to a 3 story building's height.......DEEP.
In your last photos, that figure sure looks like a man from far off, but when you get up close, the head looks more like a bear's head looking to the right (as you're looking at the pic). I don't know if the Spanish ever put a bear's head on a man's figure, but the Ancients sure could have.

In the close up photo, the body of the sculpture could easily be the body of a bear, with the way the arm / leg is formed (on the left as viewing the photo). Overall, I think it is a bear standing on it's hind legs, looking off to the right. Hope I haven't confused you too much.