No treasure under the rock. I could put you in touch with an expert in petroglyphs, though, if you want. Guessing these are Hohokam, so probably in Arizona....pretty common designs, but certainly in nice shape and not vandalized.
an archeologist at the National Institute of Anthropology and History
found these petroglyphs, on a remote mountain in Coahuila
who ever carved these prob carved yours, talk to landowner see if they
want to talk to the Institute about the rocks