In October 2003, China's first astronaut, Lieutenant-Colonel Yang Liwei, returned to Earth after a stint in orbit. After emerging from his capsule, Liwei was asked a burning question by an eager television interviewer: "Is it true that you can see the Great Wall of China from space?" Yang's answer? "Erm... no."
[Despite testimony from dozens of NASA astronauts that one can see only white clouds, blue oceans, yellow deserts and green vegetation, the myth has persisted that the 1,500 mile wall is the only man-made structure visible from space.]