The 2nd Tunnel was discovered in an area 13km north of Cheorwon within the DMZ on March 19, 1975.
As arch of rocks, it has 2.1m width, 2m height, 3.5km length and located between 50 and 160m (160 and 520ft) below ground.
About 30,000 armed troops could infiltrate through the tunnel in an hour with vehicles, artillery pieces, and even tanks.
It's Available to explore 500m length of the tunnel for now and accessible to nearest Southern limit line. Possible to watch lush greenery near Guard Posts and General Out Posts of South Korea versus Guard Posts, Naktagoji, and Kim Ilsung goji of North Korea.
The granites, formed in 110 milion years ago, was covered by basalt lava flow and eroded after made asymmetrical natural views of Hantan River
Able to feel dazzling and beauty by walking through 30 and 40m heights cliffside path which surrounded by Columnar jointing,
UNESCO Global Geopark that has length of 3.6km and width 1.5m.
At least 2 people are required activity to take place.
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