The Third Tunnel of Aggression is one of four known tunnels under the border between North Korea and South Korea, extending south of Panmunjom.
The 3rd Tunnel was discovered on October 17, 1978 based on information provided by a defector.
It is located 52km from Seoul. Although It was estimated that it took approximately an hour and made by North korean for 10,000 soldiers to move through the tunnel.
They denied building the tunnel, and then North Korea officially declared it part of a coal mine; black “coal” was painted on the walls by retreating soldiers to help confirm this statement.
So the tourists can be observably granite, a stone of igneous origin, whereas coal would be found in stone of sedimentary origin in the 3rd Infiltration Tunnel.
And It runs through bedrock at a depth of about 73 m below ground.
When this tunnel was first discovered, North Koreans insisted it was made by South Koreans in a plot to invade North Korea.

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The 3rd Infiltration Tunnel Related Tour Package
DMZ Morning Tour(Half Day)
– DMZ Morning Tour with Lunch
DMZ Afternoon Tour(Half Day)
DMZ & Seoul City Tour(Full Day)
DMZ & Panmunjom ( JSA ) Tour(Full Day)


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