unknown always intrigued mankind.The underground city, especially the old, attract the interest of a magnet.The most attractive are those that are open, but little studied.Some of the underground cities of the world have not yet been investigated, but the scientists are not to blame - all attempts to penetrate them are fatal researchers.
There are many legends and scientific assumptions about who and what created these structures.Some suggest that it was the refuge of ancient people, while others hypothesize that the underground cities were built extinct terrestrial or extraterrestrial civilizations.After all, there are fairy tales and fantastic stories about people living under the ground, but there is no evidence that all of them solid fiction.
Derinkuyu - an underground city in Turkey, the most studied and well-known today.It was opened in 1963 in central Cappadocia.In this area is a network of multi-tier cities, leaving deep into the earth.According to the Turkish scientists, the lowest level is open to visiting Derinkuyu is 85 meters.Under assumptions of researchers are still following the order of 20 storeys.Currently open for tourists 12 floors.On each level you can find a space intended for living, for keeping domestic animals, temples, underground shafts, ventilation shafts.And that's about when and who built the underground cities in Cappadocia is still debate.Some scholars date the emergence of the VI century BC.e., suggesting that created them early Christians as a refuge from persecution.Others argue that there was a network of cities of more than 13 million years ago and built an unknown ancient civilization.One way or another, but still could not find any burial of those who created this masterpiece of underground architecture.
No less interesting underground cities built in the last century in various countries of our contemporaries.For example, in Burlington, built in England for the British government.Its construction came from the 50s of the last century and was intended to cover the country's leadership on the nuclear attack.Despite the small size of the dungeon (total 1000 square meters), it could accommodate up to 4,000 people at a time.The city built hospitals, railway stations, highways and unique tanker for drinking water.Throughout the Cold War, Burlington kept in full readiness to take people.
Chinese leader Mao Zedong has surpassed the British.He was elevated to a secret underground city near Beijing, stretching for 30 km.Although its purpose was to protect the members of the government and their families in the event of war, the infrastructure of the city is quite large.In the cave they were built hospitals, shops, schools, hairdressers and even a stadium for roller skating.It also has built an extensive network of bomb shelters.Stay underground city of Beijing would almost half the population of the upper city.There is even speculation that in many houses of the capital, there are special mine to quickly descend into a dungeon.Since 2000, the city is open for mass visits.Most of the territory is given over to youth hostels.
