longest wall in the world is the Great Wall of China, which stretches for approximately 13,171 miles (21,196 km) across China's rugged landscape. It was built over several centuries to protect the Chinese Empire from invasions and raids by nomadic tribes.
The Great Wall of China is not only the longest wall but also one of the most impressive architectural achievements in history. It winds its way across mountains, valleys, and deserts, with watchtowers, beacon towers, and gateways.
: facts about the Great Wall of China:
Built over 2,000 years ago
Originally constructed to keep out Mongol invaders
Stretches across 15 provinces in China
Made of stone, brick, rammed earth, and wood
Has over 2,000 watchtowers.