Fearless graffiti artists abseiled down a cliff and painted mock prehistoric artwork at Britain’s biggest caves, the Wookey Hole tourist attraction in Somerset.
The Banksy-style graffiti attack took place during the night on July 28 or 29 and the culprits created two paintings.
One work was dated 33,000 BC and shows cavemen being chased by mammoths. The second was headed 2013 shows police officer chasing graffiti artists.
Skillful depictions of a prehistoric family and a mammoth were also painted in the cave exit tunnel.
Wookey Hole owner Daniel Medley was left baffled by the raid.
Speaking in the local press, he said: "Obviously we are not far from Bristol where the council are encouraging graffiti art and where Banksy started….
“…for now the caves are open and we are letting the public decide whether they think the graffiti is art or vandalism.”