Which world-famous landmark has designated graffiti zones?

China is trying to keep visitors from scratching messages or leaving “tags” on the Great Wall, the 5,500-mile-long UNESCO World Heritage site that was once the world’s largest military structure.

The Mutianyu section of the Great Wall of China is one of the most-visited sections of the wall in the world, and therefore also the most impacted by visitors. To help curb the temptation to leave a mark on the wall, Chinese officials introduced designated “graffiti zones,” where visitors are allowed to write a message in ink on a plastic-like screen. When a zone is filled, it's replaced with a blank canvas for new artists to make their (temporary) mark.

The Great Wall isn't the only global landmark to grapple with graffiti either. Stonehenge in England and several landmarks in Egypt have also been defaced by people who want their stamp to last as long as the structures themselves.