Great wall of China, satellite image

Great wall of China, satellite images. These images show two segments of the wall, both in a desert in north-Central China. The wall is the thin orange line running vertically in the left image and from upper centre left to lower right in the right image. These segments of the wall were built in the 15th century, during the Ming Dynasty and measure between 5 and 8 metres tall. The combined length of these two segments is 150 kilometres. At the centre of the left image are dry lake beds (blue) that have been developed for salt extraction. Image taken by the Spaceborne Imaging Radar aboard the Space Shuttle Endeavour.

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