The Great Wall is in China. It was built 2000 years ago during the Qin Dynasty. The wall has been called “the only man-made object visible from space.”It’s very long! How long? Nobody knows for sure because it depends on how you measure, but there are estimates that say the Great Wall of China is between 5000 and 6000 kilometres (3000 to 4000 miles) long.
That’s a lot longer than I thought! And now think about all those people building this incredible wall back then…and they didn’t have machines or anything like we do today – just their own strength and determination along with lots of time because construction took centuries! If you go to visit, bring walking shoes so you can see it for yourself!