Infiltration Tunnel #2

This is the entrance to one of the infiltration tunnels that North Korea made in an attempt to invade South Korea. Unfortunately we were not allowed to take any pictures once we entered the tunnel. I was surprised that almost the entire tunnel did not have any reinforcing walls or structure. The tunnel walls were entirely dirt with water dripping and moss growth. Some parts of the tunnel were as high as 7.5 feet, while other parts were only 4 ft high. Sections leading to North Korea were barricaded with security cameras and warning signs of no trespassing.