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.
Fullsize image: https://diqn32j8nouaz.cloudfront.net...1_fullsize.jpg
https://diqn32j8nouaz.cloudfront.net..._borehole1.jpg
Fullsize image: https://diqn32j8nouaz.cloudfront.net...2_fullsize.jpg
https://diqn32j8nouaz.cloudfront.net..._borehole2.jpg
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Previously:
https://www.homemadetools.net/forum/...055#post153383
https://www.homemadetools.net/forum/...071#post141081
https://www.homemadetools.net/forum/...7862#post86386
https://www.homemadetools.net/forum/...408#post177447
