The 3rd Infiltration Tunnel
210-358, 3rd Tunnel-ro, Gunnae-myeon, Paju-si, Gyeonggi-do
Discovered in 1978, this is an invasion tunnel built by North Korea, located 52km from Seoul. The tunnel measures 2m in width and height with a total length of 1,635m, capable of moving 30,000 troops…