Depth of the Mponeng Gold Mine (South Africa)

Depth of the Mponeng Gold Mine (South Africa) (3.9 km)

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Neat Ratios ...

Depth of the Mponeng Gold Mine (South Africa) (3.9 km)

is 1/4000 of Circumference of Mercury (15,330 km)...more
is 2 x Height of Mt Washington, highest point in NE USA (1.917 km)...more
is 4 x Height of the Angel Falls (Venuzeula) (979 m)...more
is 20 x Height of the Gateway Arch in St Louis (192 m)...more
is 40 x Height of the Elizabeth Tower (home to Big Ben) in London (96 m)...more

If this was a standard unit ...