The famous wall in China that is often claimed to be visible from space is the Great Wall of China. This ancient structure stretches over 13,000 miles and was primarily built during the Ming Dynasty to protect against invasions. Despite the popular belief that it can be seen with the naked eye from space, astronauts have reported that it is challenging to distinguish the wall without aid due to its similarity in color to the surrounding terrain. The Great Wall symbolizes China's historical strength and architectural ingenuity, attracting millions of visitors every year.