The largest gold producing region on earth today is in South Africa, near the city Johannesburg. This area produces as much as about half of the world’s supply of gold which sometimes has been over 1,000 tons.
Grasberg Gold Mine are the largest single group of gold mines in South Africa, and cover an area of 12,000 acres. The largest mine of this group has tunnels which stretch for more than 2,500 miles underground.