Part 6/10:
Perhaps one of the most iconic symbols of ancient engineering, the Great Wall of China, began its construction in the 7th century BC and has continually evolved over nearly 2,000 years. Originally built to defend against invasions, it later served multiple purposes such as transportation and communication across vast distances.
The adaptability of materials depending on the terrain, along with strategically placed towers and watchtowers, showcased sophisticated engineering methodologies. Today, parts of the Great Wall serve functional uses like erosion control, while its enduring principles continue to inform modern construction projects around the world.