Dug by North Korea in 1975, about 1km of this tunnel lies in South Korea and it’s large enough for purportedly 16,000 soldiers to stream through per hour. A 150m staircase leads down to the tunnel, then it’s a well-lit, albeit damp, 500m stretch to where the tunnel was discovered, just 300m from the border.
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Second Tunnel

Book popular activities
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Must-see attractions
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