[redis_mlc]

I was going to say that.

We can see the Great Wall of China from space.

And we can also see beaver dams from space.

(Note the Great Wall was built for a mundane reason - the Han people couldn't defeat the Mongols on horseback, but they could keep building walls until the horses could no longer enter. Byzantium/Constantinople also adopted that strategy, which worked for over 1,000 years until the Ottomans built the world's largest cannon and blasted holes in it.)

[Others]

Nit: you cannot see the Great Wall from space unaided: https://www.nasa.gov/vision/space/workinginspace/great_wall....

[azundo]

That said, no beaver has seen either from space.

[wombatmobile]

We can see water coloration from algae in space.

If you weren't impressed when you read the above sentence, imagine how algae feel when they read your sentence about the Great Wall of China.

[ekianjo]

You can see everything from space nowadays. How is that a helpful argument for anything ?