The oldest representations of hallucinogenic mushrooms in the world are in The Sahara Desert. They were produced 7000-9000 years ago. The idea that the use of hallucinogens should be a source of inspiration for some forms of prehistoric rock art is not a new one.
What is remarkable about these ethnomycological works, produced 7,000 - 9,000 years ago, is that they could indeed reflect the most ancient human culture as yet documented in which the ritual use of hallucinogenic mushrooms is explicitly represented.