10 Biggest Deepest Holes in the World

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5. Mponeng Gold mine

Depth: about 2.5 miles (4km)

Number five on our list of biggest deepest holes in the world is this deepest gold mine in the world in Gauteng South Africa is effectively an underground city. The current size of it is not big enough, and they are exploring whether an expansion can extend its life beyond 2050.

10 Biggest Deepest Holes in the World

Pixabay/Public Domain

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