Visiting the DMZ was one of the most fascinating experiences ... that it’s quiet again now! The 3rd Infiltration Tunnel is one of four known tunnels under the border of North and South Korea.
"Only 40 tour buses are allowed in the DMZ every day," Lee said ... Lee told us the history of our next stop — the 3rd Infiltration Tunnel. The 3rd Infiltration Tunnel was discovered in 1978 ...