Read more: 5 national parks to visit near Ooty this summer In contrast ... This endeavour, known as the Kola Superdeep Borehole, proved more successful, penetrating deeper into the Earth and ...

The Kola Superdeep Borehole is the deepest manmade hole, and deepest artificial point, on Earth, measuring at 40,230ft feet. To put it into perspective, that's 12.2km, or 7.58 miles - that's the ...