You cannot see the Great Wall of China from space with just your eyes.

The International Space Station flies about 400 kilometers (250 miles) above the Earth. At this height, the human eye can only pick out very large objects or things with bright, clashing colors. Most of the Great Wall is only 5 to 9 meters (16 to 30 feet) wide. This is way too small for our eyes to see from that far away.The materials used to build the wall also make it hard to spot. It was built using local stones, gray bricks, and packed dirt. These colors are almost exactly the same as the surrounding mountains and deserts. Without a big color difference, the wall just disappears into the background.Real astronauts have proven this many times. Yang Liwei, the first person China sent into space in 2003, said he couldn't see the wall at all. NASA astronaut Leroy Chiao tried to find it while he was on the space station. He managed to take a photo of it using a powerful 180 mm camera lens, but he admitted he couldn't see it with his own eyes through the window.The idea that you can see the wall from space is an old myth that started long before humans actually went to space. In 1932, a famous book called Ripley's Believe It or Not! claimed it was visible, and people just believed it. Today, we know that while the wall is a massive human achievement, it is simply too narrow and well-camouflaged to be seen from orbit without a telescope.