Looks like neither of us can spell it, seems it's pareidolia :) But as I understand it you do have to have something there to see (or hear) to start with, it's just you might then elaborate it / misinterpret it.
Anyway it's all right, I do believe rock art exists. Having a human tendency to see circles in things egged on by helpful lichens and shadows is probably a good way of spotting something faint but real. Better get out the torches and a thick bit of material, HSD...