“The Great Wall of China is visible from space and its 10’ wide. That whole “visible from space” thing is greatly overblown.”
Is China’s Great Wall Visible from Space?
https://www.scientificamerican.com/article/is-chinas-great-wall-visible-from-space/
Artificial structures visible from space
https://en.wikipedia.org/wiki/Artificial_structures_visible_from_space
Yes, I just went to Google Earth and it is clearly visible.