5. Sanxingdui Ruins site, Sichuan province
Revered as one of the greatest archeological finds of the 20th century, the Sanxingdui Ruins are believed to be the remnants of the Shu Kingdom, dating back at least 4,800 years and lasting over 2,000 years.
The ruins are located in Guanghan city in Southwest China's Sichuan province, covering 12 square km.