Pingyao City Wall, a UNESCO-listed Ming Dynasty fortification, is one of China’s best-preserved ancient defensive systems. Built in 1370 and expanded over 200 years, it encircles Pingyao Ancient City, a 2,800-year-old settlement in Shanxi Province. The 6.4-kilometer-long wall, made of rammed earth faced with brick, features 72 watchtowers, 3,000 crenellations, and a 12-meter-wide moat. Designated a UNESCO World Heritage Site in 1997, it symbolizes Ming Dynasty urban planning and military architecture, offering panoramic views of a living museum of Qing Dynasty streets and courtyard homes.