FALSE

The claim that the Great Wall of China is visible from space with the naked eye is a documented myth that has been debunked by both scientific analysis and astronaut testimony 1 3 5. High-credibility sources including NASA and peer-reviewed research state that the wall is generally invisible to the naked eye even from low-Earth orbit because it is too narrow and its color blends into the surrounding natural terrain 1 4 12. Physiological studies conclude that the limitations of the human eye make it impossible to resolve the structure from such distances 2. While one moderate-credibility source repeats the claim 11, it is directly contradicted by experts and astronauts who have confirmed the structure cannot be seen without high-powered lenses 6 9 10. The idea that it is the only man-made object visible from the moon is also categorized as tenaciously incorrect by fact-checkers 3.