The Great Wall, an iconic structure, is located in China. This remarkable feat of engineering was built over various dynasties, primarily during the Ming Dynasty, to protect Chinese states and empires from invasions by nomadic groups and military incursions. The wall stretches approximately 13,170 miles across northern China, incorporating walls, trenches, and natural barriers. It serves as a symbol of China's historical strength and ingenuity, attracting millions of tourists annually. The Great Wall was designated a UNESCO World Heritage Site in 1987, recognized for its cultural significance and architectural grandeur, making it one of the most iconic landmarks in the world.