Secret underground tunnels discovered in ruins of 4,300-year-old Chinese city
2025-07-30
The city of Houchengzui in northern China is an archaeological site dating back more than 4,000 years. Back then, it was a heavily armoured place with three concentric defensive walls, turrets, guarded gates and trenches. However, historians might have found an easier way in: a network of secret tunnels. ChineseContinue Reading
