The second largest artificial hole in the world (surpassed only by the Bingham Copper Mine in Utah) is a diamond mine on the outskirts of Mirny, a small town in eastern Siberia.
Also called ” Mir mine “, the first excavations of this mine to start in 1955, where at that time it was only small. Today it is 525 meters deep and runs a distance of 1.25 kilometers in diameter. The construction and drilling of this mine was ordered by Stalin, to meet the needs of the Soviet Union in industrial grade diamonds after the war.
However, the growing Mirny mine, the hard, frozen Siberian landscape made work on the mine particularly difficult. The jet engines were activated on the inflexible permafrost (permanently frozen ground) in order to melt it; when that failed, explosives were used, making the huge hole a little bigger. During its peak years, the Mirny mine produced more than 10 million carats of diamonds a year, a good percentage of which was of very good quality.
Although open-pit mining has ceased, mining continues underground. The huge rock transport trucks serve the Mirny Mine traveling along a road spiraling down the hole to its basin.
Although it has been said that the airspace above the mine is prohibited to helicopters, it is said that some misinformed pilots have been “sucked” into the hole, by the air currents that rush in the mine.
All images in this article come from: Amusing Planet