Great Wall of China waaay longer!

Known to the Chinese as the "long Wall of 10,000 Li", the Great Wall is in fact a series of walls and earthen works begun in the 5th Century BC and first linked up under Qin Shi Huang in about 220BC.
From satellite image: http://www.world-heritage-tour.org/asia/china/great-wall/map.html

clipped from news.bbc.co.uk Great Wall of China 'even longer' The Great Wall of China is even greater than previously thought, according to the first detailed survey to establish the length of the ancient barricade. A two-year government mapping study found that the wall spans 8,850km (5,500 miles) - until now, the length was commonly put at about 5,000km. clipped from en.wikipedia.org