Third Infiltration Tunnel Paju Travel Guide

The Third Infiltration Tunnel — often called the Third Tunnel of Aggression — is located near Paju in Gyeonggi Province, South Korea, in the southern portion of the Demilitarized Zone (DMZ) that divides the Korean Peninsula. It was discovered in October 1978 following a tip from a North Korean defector. The tunnel runs roughly 1,635 metres in length, reaches a depth of approximately 73 metres below the surface, and is wide enough to allow an estimated 30,000 troops per hour to pass through — a detail that underscores the serious military purpose for which it was constructed.

North Korea initially claimed the tunnel was a coal mine, even painting the granite walls black as evidence, though no coal deposits exist in the area. South Korean authorities were unconvinced, and the site has since become one of the most visited destinations along the DMZ, drawing historians, students, policy researchers, and curious travellers from around the world.

A visit here is less a conventional tourist experience and more a sober encounter with living geopolitical history. The site sits within a broader cluster of DMZ-related attractions in the Paju area, making it a logical anchor for a day exploring the border region. All visits take place on the South Korean side; the tunnel is accessible to international tourists under normal tour conditions.

Visas and Entry

The Third Infiltration Tunnel is located in South Korea (Republic of Korea), not in North Korea. Travellers are entering South Korean territory. For visa requirements specific to your nationality, check TravelerPulse's Visas section and consult the official South Korean immigration authority (Hi Korea, at www.hikorea.go.kr — verify the URL is current before visiting).

Permits and Access Rules

The tunnel site is within or adjacent to the DMZ, a restricted military zone. Access is managed and visitors must follow the rules set by the site operators and the South Korean military. Photography is restricted in certain areas and signs clearly indicate where cameras are not permitted — heed these carefully. Visitors must pass through a security checkpoint.

Physical Considerations

The descent into the tunnel involves walking along a steep inclined walkway (gradient of roughly 11 degrees) and the tunnel interior is low-ceilinged in places — hard hats are provided and are mandatory. Visitors with mobility difficulties, heart conditions, or claustrophobia should consider their comfort carefully before entering. The temperature inside the tunnel is significantly cooler than the surface year-round; bring a light layer regardless of the season.

From Seoul

The most practical departure point is Seoul. Organised DMZ tours departing from central Seoul (typically from around Hongdae, Myeongdong, or the War Memorial area) are the most common way international visitors reach the site, as independent access to the immediate DMZ area can be restricted. Tour operators handle transport, entry, and guide services; verify current operators and departure points locally or through your accommodation.

By Public Transport and Self-Drive

Paju city is reachable from Seoul by bus or by taking the Gyeongui-Jungang Line toward Dorasan Station. However, the tunnel site itself is not on a standard public transit route — a taxi from Dorasan Station or from Paju city centre is one option, though visitors should confirm with the site directly whether independent (non-tour) access is currently permitted, as this can change based on inter-Korean relations and security conditions. Driving from Seoul via the Jayuro Expressway is feasible; parking is available at the site (verify hours and fees on arrival).

Organised Tours

Joining a structured DMZ tour from Seoul is strongly recommended for first-time visitors. These tours typically include transport, an English-speaking guide, and coordinated access to the tunnel alongside other nearby DMZ sites such as Dorasan Station and Imjingak. Book in advance, especially in peak spring and autumn seasons.

The Tunnel Itself

The central experience is descending into the tunnel via the access shaft and walking as far as the barricade that marks the boundary — visitors cannot cross into the North Korean section. Hard hats are issued at the entrance. The walk is moderately demanding due to the incline and low clearance in sections. Allow roughly 30–45 minutes for the tunnel portion of the visit.

Dora Observatory (Dorasan Observatory)

Located nearby, this observation deck offers one of the clearest legal views of North Korean territory available to civilians, including the North Korean propaganda village of Kijong-dong and, on clear days, distant mountains. Binoculars are available on site (verify whether rental fees apply). This is typically included in organised DMZ tours.

Dorasan Station

The last station on the Gyeongui Line before the North Korean border, Dorasan Station is a functioning but largely dormant railway terminus — a poignant symbol of a divided peninsula that once had cross-border rail service. The platform and waiting area are accessible and the station has a small exhibition. Stamping your passport here with the station's commemorative stamp has become a popular visitor ritual.

Imjingak Park

A short distance south of the DMZ proper, Imjingak is a public park and memorial site accessible without special permits. It contains the Bridge of Freedom (across which POWs returned after the Korean War), displaced persons' shrines, decommissioned military equipment, and the Mangbaedan altar where those separated from family in the North hold memorial rites. It is a genuinely moving place and appropriate for quiet reflection.

Opening Hours and Admission

The Third Infiltration Tunnel site has set visiting hours and charges an admission fee; both are subject to change. Check the official Imjingak or Paju City tourism resources and verify directly with your tour operator or the site before visiting — do not rely on third-party figures.

What to Bring

• A valid passport or national ID (required at military checkpoints)
• A light jacket or layer (the tunnel interior is cool year-round)
• Comfortable, closed-toe walking shoes with good grip for the inclined walkway
• Cash in KRW; card acceptance at smaller facilities in the area cannot be guaranteed
• Water, as the nearest convenience facilities may be limited once inside the restricted zone

Photography

Photography rules are strictly enforced and vary by specific location within the site. When in doubt, do not photograph. Confiscation of devices or removal from the tour is possible for violations.

Language

Signage at the main DMZ sites is generally available in Korean, English, Chinese, and Japanese. Organised tour guides typically speak English; confirm language availability when booking.

The Third Infiltration Tunnel site is managed by South Korean authorities and is considered safe for civilian visitors under normal conditions. There is a significant and visible South Korean military presence in the area, which is standard and not a cause for alarm.

Visitors should monitor the general security situation on the Korean Peninsula before travel, as heightened inter-Korean tensions can occasionally lead to temporary site closures or restrictions on DMZ access. Check your government's travel advisory for South Korea before departure — links to official advisories are available in TravelerPulse's Safety section.

Do not stray from designated paths or authorised areas at any point during a DMZ visit. The broader DMZ contains landmines in areas outside designated visitor routes, and boundaries exist for serious reasons. Follow all instructions from guides and military personnel without exception.

The DMZ and the tunnel sites carry profound emotional weight for Korean visitors, particularly older generations who may have living family members on the other side of the border. Approach the experience with corresponding seriousness and respect. This is not an adventure attraction — it is a site of ongoing geopolitical consequence and personal grief for millions of people.

Avoid loud or flippant behaviour, especially at memorial areas such as Imjingak. When observing North Korean territory from Dora Observatory, be mindful that your commentary is audible to others who may have a deeply personal relationship with what they are looking at.

Photographing fellow visitors in moments of emotion without consent is inappropriate. The Korean concept of nunchi — a sensitivity to the mood and feelings of those around you — is a useful frame of mind for navigating this environment thoughtfully.