The Kola Superdeep Borehole is the deepest manmade hole ... down that water could not permeate through it.” A bit like the space race, there was a race to explore the unknown 'deep frontier'.

T he Kola Superdeep Borehole holds the record for being the deepest artificial point on Earth, reaching almost 12,262 meters (40,230 ft) into the ground. In simple words, the depth of this hole is ...