The Great Wall of China

Did you know that the Great Wall of China is not a single continuous wall but a series of walls and fortifications? It stretches over 13,000 miles and was built over several dynasties, primarily to protect against invasions.

Construction Facts

• Started: 7th century BC
• Materials: Stone, brick, tamped earth, and wood.

This architectural marvel is a UNESCO World Heritage site and attracts millions of visitors each year.