Artificial structures visible from space - Wikipedia

Almost a third of China's Great Wall has disappeared, China

Great Wall - NASA

See if you can find the Great Wall of China in this ISS image - CNET

The Great Wall of China As Seen From Orbit - SpaceRef

Can You See The Great Wall of China From Space?

NASA Confirms: You Can't See the Great Wall of China from Space

When is the best time to visit the Great Wall of China?

Great Wall China Space Stock Photos and Pictures - 1,921 Images

China's Earth science satellite transmits images home - Xinhua

Is Great Wall of China Visible From Space? Debunking Space-based Myth - Times of India