Qiantang River Tidal Bore

On the 18th day of the eighth lunar month, the tide at the mouth of the Qiantang River turns from a distant white line into a wall of water spanning the river within minutes, roaring past right before your eyes. Since the Song dynasty there has been a saying, "The tide of the eighteenth of the eighth month has no equal in the world," and for a thousand years the sea wall at Yanguan, Haining has been crowded with people waiting for it.