Wanderyn
Third Tunnel of Aggression
Photo: Wikimedia Commons
poi · KR

Third Tunnel of Aggression

Getting around: Located near the DMZ north of Seoul; accessible only via organized DMZ tour bus from Seoul, since independent access isn't permitted — most visitors book a half-day or full-day DMZ tour that includes this stop.
Hours: Access tied to DMZ tour schedules, generally daytime hours; the tunnel itself may periodically close for maintenance, so tour operators adjust itineraries accordingly.

The Third Tunnel of Aggression is one of several tunnels discovered running beneath the DMZ, dug by North Korea (reportedly capable of moving a large number of troops per hour) and discovered in 1978 based on a tip from a defector. Visitors can descend via a steep sloped tunnel (or a small monorail, for those unable to manage the walk) to view the excavated tunnel itself, now sealed with concrete barriers close to the border.

It's typically combined with Dora Observatory and other DMZ-area sites on the same tour, and the descent and return can be physically demanding given the incline, so it's worth considering fitness level when planning, though the monorail option accommodates most visitors.

Third Tunnel of Aggression FAQs

How was this tunnel discovered?

It was found in 1978 based on a tip from a North Korean defector, one of several infiltration tunnels discovered running beneath the DMZ over the years.

Is the descent difficult?

It's a steep, sloped walk down and back up; a small monorail option is available for those who prefer not to walk the incline.

Can I visit independently?

No, access requires joining a licensed DMZ tour departing from Seoul; independent access to this area isn't permitted.

Is it usually combined with other DMZ sites?

Yes, it's typically paired with Dora Observatory and other border-area stops on the same tour itinerary.

Do I need my passport?

Yes, passport identification is required for DMZ-area tours.

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