China’s Great Wall is disappearing

The Great Wall of China was first constructed in the third century BC.- AFP

The Great Wall is not a single unbroken structure but stretches for thousands of kilometres in sections, from Shanhaiguan on the east coast to Jiayuguan in the windswept sands on the edge of the Gobi desert.

In places it is so dilapidated that estimates of its total length vary from 9,000 to 21,000 kilometres (5,600 to 13,000 miles), depending on whether missing sections are included. Despite its length it is not, as is sometimes claimed, visible from space.