The weather-beaten Wu City Wall was carved directly out of the mountain in China’s Three Kingdoms Period nearly two centuries ago. The 3,000-meter-long site was part of the Stone City, an ancient town built on the 100-meter-tall Qingliang Hill.

In front of a pond near the north end of the fortress, there is a wall stone whose silhouette rather resembles a human expression. Locals dub the scene ‘a grimace looking into a mirror’.