The Great Wall of China is located in China. This ancient series of walls and fortifications was built primarily to protect against invasions from nomadic groups and military incursions. Construction began as early as the 7th century BC and continued for centuries, with the most recognizable sections built during the Ming Dynasty (1368-1644). Spanning thousands of miles across northern China, the Great Wall is now a UNESCO World Heritage site and stands as a symbol of China's historical strength and ingenuity. It attracts millions of tourists each year, showcasing the country's architectural and engineering achievements.