Kola Superdeep Borehole - photos

[Altair]

Dug by the Soviets in the 1970s, the Kola Superdeep Borehole in Russia was the deepest artificial point on earth at 2,262 meters (40,230 ft.) It was surpassed in 2008 by a 12,289-meter deep (40,318 ft.) oil well borehole off the coast of Qatar.

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Previously:

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