The Leshan Buddha, an ancient statue carved from a cliff in southern China, is slowly dissolving. The giant stone Buddha, the world’s largest, seated with its hands planted on its knees, looks out resolutely over the waters of the Minjiang River and across to Mount Emei, one of the four sacred Buddhist mountains of China. Since being chiseled from a cliff in Sichuan province in the Tang dynasty (8th century), it has for 1,200 years drawn a continuous stream of pilgrims, tourists, and scholars; in 1996, the Buddha was named a UNESCO World Heritage Site.