The Deepest Hole In the World, Kola Superdeep Borehole
The Kola Superdeep Borehole began drilling on May 24, 1970, and is to date the deepest manmade hole in history. The deepest reached is 12,262 meters (40,230 ft; 7.619 mi) in 1989, the deepest human-made hole on Earth, and remains so as of 2023.











