I have been to Great Wall of China when I was in college.
It moved me because the Great Wall was too long to imagine how long it would be.
The Great Wall is located in the northern part of China and, no doubt, the longest structure in the world. It is said that the length is more than 7000 km, which is longer than the Japanese archipelago. Wonderful. I cannnot imagine how long it took to create.
I have heard that the Great Wall is the only human-made construction that can be seen in the universe. I thought it would make sense because it is incredibly humongous. However, a podcast I listened to the other day said that it is a common myth. Actually, it seems like nobody can see the Great Wall from outer space.
I am still wondering if it is true or false.
I am looking forward to receiving the answer from an astronaut who happens to read my blog in the International Space Station or ISS.