The 4th Infiltration Tunnel

제4땅굴

Walk into a tunnel dug from the north

⚠ Entry permit required

Address

Ttanggul-ro, Haean-myeon, Yanggu-gun

A tunnel dug from the north and found in 1990. After a film at the education hall you walk down a southern access shaft to reach it. The rock is cold inside, so bring a layer even on a warm day.