The Great Wall of China is so large that it is the only human-made structure visible from space or from the moon.
While the wall can be photographed from low Earth orbit under ideal conditions, it is not distinctly visible to the naked eye from space due to its width relative to viewing distance and the difficulty in distinguishing it from the surrounding terrain. Many other structures like highways and airports are similarly visible. Astronauts have reported not being able to see it clearly.
Reception
Go deeper
- Browse real Australian suburbs (visible from low Earth orbit too) · postcodes.refdat.com
Sources
- NASA: Great Wall of China Myth PRIMARY
- Snopes: Great Wall Visibility REFERENCE