Longyou County in the midwest of East China’s Zhejiang Province , has a small river which wriggles across the long and narrow area, and divides the county seat and the opposite Phoenix Hill. For thousands of years, the hill has been nothing more than a tranquil and silent earth pileup covered with thick forests. But the incredible discovery on June 9, 1992, which unveiled a long-hidden mystery on Phoenix Hill, made the place one of the best-known places in China.

read more A Lingering Mystery: Longyou Grottoes Part I.