The 4th Tunnel (제4땅굴)
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| registration date | 20040305191652 |
| Modified date | 20221014151150 |
| address | Ihyeon-ri, Yanggu-gun, Gangwon-do |
| type | Culture/Art/History |
| area code | Gangwon-do |
| tel | +82-33-481-9021 |