The historical feature known as the Great Wall of China is a series of fortifications built to protect Chinese states from invasions. Stretching over 13,000 miles, its construction began as early as the 7th century BC and continued until the 16th century. The wall, with its imposing structure, reflects the ingenuity of ancient engineering and military strategy. Today, it stands as an enduring symbol of China's rich history, attracting millions of visitors each year. Various sections, such as Badaling, are restored for tourism while others remain in a more natural state.