What is the deepest anyone has dug into the earth?
Kola deep hole in Russia is 12,5 kilometer deep.
The Kola Superdeep Borehole is located 10 kilometers north of the town of Zapolyarny, in the Pechengsky District of Murmansk Oblast, Russia. The Kola Core Repository is in the town of Zapolyarny. Best to have a suitable car for bad roads.
picture credsi t scopyfy .org.