Today the hole remains a third of the way through the Baltic Continental crust. It is 40, 230 feet deep. It is the deepest borehole in the entire world. But it is greatly feared. To this day, its mysteries are still being analyzed.
Before this borehole was drilled, scientists could only theorize what lay beneath the surface of the earth. They thought they knew what to expect, but they were sadly mistaken. Photo Credit: