Interesting, and welcome to Tnet. I assume these pics are in Albania? I don't know about the first pic, but the snake is interesting. I'm no expert on treasure signs (but there are some here over in the treasure signs and symbols area) but have studied it a little. The style is a little different than what I've seen in American Indian petroglyphs. I would guess that the head is a pointer, but it's interesting that the tail appears to be cut off, which might mean something. I know you wanted a better pic, but it's best not to chalk petroglyphs as it can damage them.