Big Hole - Kimberley, South Africa. Largest Man Made Hole in the wold. Many are suprised to see pickup trucks underground. Kimberley, South Africa. Ore skip approaching a collector bin. 645 m Underground. Bultfontien diamond mine Kimberley, South Africa. Underground skip, used to transport ore. Bultfontien, Kimberley, South Africa. Conveyor Belts moving crushed ore to surface. Mine Workshops Supports clearly visable in this shaft. Skip unloading ore into a collecting bin. Underground elevators. 850 m Underground. Giant ore crushers.