The Great Wall
The Great Wall is a protective wall erected by the Chinese to protect the invasions of tribes from the steppes of north (Mongols, Huns, Manchu, etc.) The Great Wall is the largest human-built building in terms of length, area and mass. This is one of the world's most visited tourist sites. It would, it seems, visible to the naked eye from space but this claim has been refuted and reaffirmed several times. With a height of between six and seven meters and a width of four to five meters, the Great Wall has guard towers at regular intervals. However, it does not fulfill its protective function because sentinels was corruptible. By cons it was very useful to carry goods, men and material in mountainous areas.
Location of the Great Wall
The Great Wall is 6700 km long, from
, bordering the South China Sea, to in Gansu province. Visitors thus have a wide range of tour points!
History of the Great Wall
During the Warring States period (476-221 BC), each kingdoms built walls to protect themselves from invasions, especially from barbarians of the north. When the First Emperor unified China in 221 BC, he demolished the inner walls of the empire and joined the various walls of the north. The wall that we know date of the Ming Dynasty (1368-1644), which instituted the brick and stone block to ensure the sustainability of construction. It ends up falling into oblivion and was saved by tourism. Large areas have been restored and opened to the public.