In my opinion to be classified as an underground building, these structures must be man-made for permanent human use rather than deep level mines. We’ve chosen to feature only a few underground buildings to demonstrate the efforts made over until to date.
Arsenal Station in Kiev
It sits 350 feet around 105 meters under the city. This is the deepest underground station in the world. It is as deep as the statue of liberty. The journey from the surface to the platform takes more than five minutes. To put this in context, London's deeper station Hampstead is 192 feet or 58 meters deep while New York's is approximately 180 feet or 55 meters below street level. The station's depth is due to the geography of Kiev where the city stand on a hill almost at sea level on the banks of the river Dnieper.
Traveling even deeper we find perhaps the world's most impressive underground structure constructed 575 feet or 175 meters below the border of France and Switzerland. It is the Large Hadron Collider built by the European Organization for Nuclear Research better known as CERN. Completed in 2008, the 27 kilometers long structure is the world's largest single machine and its most powerful particle accelerator built underground to shield it from background radiation.
The collider was designed to explore what happened immediately after the Big Bang.
Research Laboratories in China
The deepest buildings in the world are in fact all research laboratories just like the Large Hadron Collider. These structures are built deep into the Earth's crust to enable experiments to take place in conditions with extremely low levels of background radiation. The deepest of these impressive buildings is the underground Laboratory in China which is located an incredible 7900 feet or 2.4 kilometers under mountain in western china. This is the equivalent of seven Empire State buildings stacked on top of one another. Completed in 2010 the laboratory is an ideal site to do low background neutrino physics research and investigate dark matter.
South Africa Mine & Kola Super-Deep Borehole in Russia
Although these are the deepest known buildings in the world, humans have gone deeper in South Africa. The world's deepest mine extends more than four kilometers into the earth while at 12.2 kilometers. While the Kola super-deep borehole in Russia is the deepest artificial point on earth.
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