|The difference between
these pictures is the angle of lighting used when the photo was taken.
Possibly difficult to see at this size; wider larger images are available
via the links below.
There is a "stacked" glyph centrally located in the pics. And some smaller glyphs surrounding.
These engravings bear a number of striking similarities with Central and South American burial art, and stele.
left side image
Larger right side image