The Grasberg Mine is the largest gold mine and the third largest copper mine in the world. It is located in the province of Papua in Indonesia near Puncak Jaya, the highest mountain in Papua, and it has 19,500 employees. - http://www.theworldgeography.com/2013/06/earth-scars.html
Grasberg Copper-Gold Mine, West Papua, Indonesia: discovered in 1988, today the Grasberg mining district contains the world’s largest recoverable copper reserve and the largest gold reserve. The open pit mine forms a mile-wide crater at the surface.
Freeport Mine, Indonesia | Also known as the Grasberg complex, this is a huge mining operation in Indonesia’s Sudirman Mountains. Today, the mine is one of the largest gold- and copper-extraction operations in the world.