Tongren Wanshan Mercury Mine Site

The Tongren Wanshan Mercury Mine Site, known as the "China Mercury Capital", holds four world records: the oldest mining history (630 years), the most primitive and most advanced mercury mining and smelting technology, the rarest underground mining tunnels (about 970 kilometers deep)and the largest natural cinnabar.

The Tongren Wanshan Mercury Mine Site. [Photo/gog.cn]