The Underground Great Wall of China is a vast network of tunnels located in the remote western regions of China, near the Tibet Autonomous Region. This extensive underground system, stretching approximately 5,000 kilometers, was constructed to store and transport intercontinental ballistic missiles (ICBMs). The tunnels are part of China's strategic military infrastructure, designed to enhance the survivability and mobility of its nuclear deterrent forces.
The exact locations of these tunnels are highly classified, but they are believed to be concentrated in areas with suitable geological conditions for underground construction.