I hope that you turned off your gps feature before posting because the info of where you are at can be obtained in your pics. I don't know how to do it but I know others have told how it's done and your spot can be found.Being that is in North America I would venture to say it is Native American pictographs.In my opinion as I am Native American I would hope that you will let someone who is trained in preserving history know of the location so it could be protected for future generations to learn from and it could be studied to learn what tribes have inhabited the area.