
What happens if you jump through the deepest man-made hole in the world
“Lying below down this rusty cap is the deepest man-made hole in the world – Kola superdeep borehole. This hole is situated in Murmansk, Russia...
“Lying below down this rusty cap is the deepest man-made hole in the world – Kola superdeep borehole. This hole is situated in Murmansk, Russia...