They are usually carved on to a small lone cliff outcropping or a large boulder, at about eye level and are usually on a rugged mountian side. Sometimes the symbols are hard to see because of the patina and lichen growing on them.
I believe there are more of these sites out there but their locations are being closely gaurded by treasure hunters.
If you know of any sites or information dealing with symbols like these, please contact me and lets compare notes.
The following pictures are of some of the different sites. I have chalked them in to make them show up better. Thanks in advance for any information you could give me.
Terry
PIC #1