The historic walls of Chester have been coated in anti-pee paint to stop drunken revellers urinating on them after an evening out.
The Roman city is known for its Grade I-listed, 2,000-year-old walls built by the Romans in 70AD to protect Chester from Welsh attacks.
But the council said its fragile sandstone walls are being damaged - and the city's beauty ruined - by drunk partygoers and visitors desperate to relieve themselves.
Now the ancient brickwork has been coated with hydrophobic paint, called Ultra-Ever-Dry, which causes splash-back - leaving the guilty person with an unexpected soaking.
The council has released a humorous video and is promoting it via social media, on beer mats and posters.