Experts Blown Away by Ancient Tactical Defense Tunnels Unearthed in China
Experts reveal Houchengzui Stone City's secret defense advantage: a 4,500-year-old labyrinth of tunnels, offering a unique insight into ancient warfare and strategic urban planning.
Chen Xingcan Chinese Academy Of Social Sciences Mongolia Autonomous Region Institute Of Cultural Relics China Daily China Archaeology Network Institute Of Archaeology
Source: ancient-origins.net