The underground mine has been operating for 70 years, and is according to the company the largest iron mine in the world. The location itself has been a place f

The underground mine has been operating for 70 years, and is according to the company the largest iron mine in the world. The location itself has been a place for top mining since 1642. The site has grown so much that the mining town that was built next to it has been forced to physically relocate their old buildings in order to extend the mine.