Sado Island in Niigata Prefecture has a gold mine. They started digging in 17th Century and continued until 1989. The production of the gold in Sado was the largest in the world during 17th Century. According to Wikipedia, the gold mine in Sado produced as much as 400 kg of ...
Learning the Gold Mine of Sado IslandLearning the Gold Mine of Sado Island
28/08/201928/08/2019
0 Comments