Under this little iron hatch is the deepest hole on our planet.

In the spring of 2020, the authorities of the Murmansk region, where the Kola superdeep well is geographically located, announced plans to turn this monument of science into a full-fledged tourist site. It is easy to say, but difficult to do - the buildings have long been destroyed and looted, and only an iron disk, bolted with thick bolts, it seems, directly to the ground, reminds of the mine itself. This is a protective cap of the mine, which is better not to remove - you will have to fall VERY deep.

The Kola Superdeep Mine is officially the deepest point on our Earth - it is even deeper than the legendary Mariana Trench. And at the same time - the deepest hole in the planet of a man-made character. It was conceived as such, the whole project was of a purely scientific nature, began in the 1970s, lasted 24 years and brought an incredible amount of useful experience to mankind. Including self-confidence, in the very ability to do the impossible.

What discoveries were made during drilling? For example, the presence of water in the ground along the entire depth of drilling - scientists could not even imagine the presence of liquid 12 km under their feet! The 7 km boundary brought the fossil remains of unicellular organisms unknown to science, which indirectly indicates how strong the relief changes were, if we assume that these creatures once lived in the sea or on land, and not immediately in the depths of the earth.

The stumbling block (in the literal sense) was the rocks with an age of 2, 7 billion years. Not only ancient, but also very durable, and most importantly - heated to 180 ℃, which was an unpleasant surprise. Scientists knew that the soil would heat up as it moved down, but the calculations turned out to be erroneous by an impressive 80 ℃. The equipment was not ready for such conditions, and there was no longer an opportunity to manufacture new ones - the Soviet Union ceased to exist, and there was nowhere to wait for funding.