This picture was taken in 2005 at the Kidd Copper and Zinc mine in Timmins, Ontario showing how deep they have gone.
It shows the ore body, shafts, and workings of the time.
The model of the CN Tower in Toronto at the bottom of the picture has been used for scale.
When the mine closes in 2017 – the bottom of the mine will be closest anyone has been to the centre of the earth