In man's search for mineral wealth, many enormous holes have been dug. In addition, nature occasionally produces some astounding holes. This list is a pick of the ten most spectacular natural or manmade holes in the face of the earth. Many thanks to rushfan for sending in the images for this list

10. Chuquicamata-Chile

Chuquicamata is an open pit copper mine in Chile. It is the mine with the largest total production of copper in the world - though it is not the largest copper mine. The mine is over 850 meters deep.