Growing up in what is now Zimbabwe in the sixties my parents used to take the family out on Sunday picnics to see pre-historic cave paintings.
Park the Rover 90 up on the side of a dirt road,head off on a path into the bush till we got to a kopje(pron.copy),a massive granite geological formation formed from an old volcanic plug.
There on the underside of these huge granite boulders would be these extensive rock paintings of animals and hunters.