Underground Great Wall Tunnel

The Underground Great Wall of China is a vast network of tunnels spanning approximately 5,000 kilometers, designed for the storage and transport of intercontinental ballistic missiles (ICBMs). This Cold War-era military infrastructure represents one of the world's most extensive underground defense systems, built to protect China's strategic missile capabilities. The tunnels are part of China's broader military modernization efforts during the Cold War period, providing secure storage and rapid deployment capabilities for nuclear forces.