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Kola Superdeep Borehole: The Deepest Hole Ever Made
The Kola Superdeep Borehole, dug during the Cold War, remains the deepest hole ever made by humanity. In this video, we explore the science, history, and fascinating discoveries behind this ...
The Sun1mon
Earth’s most terrifying holes from 40,000ft Soviet ‘well to hell’ to Mexico’s mysterious 500ft-wide blue ‘sea sinkhole’
The official name for the so-called "well to hell" is the Kola Superdeep Borehole SG-3 – but that's not as catchy. It's currently the deepest man-made hole on Earth, reaching a dizzying 40,230 ...