Third Tunnel of Aggression

To reach the tunnel from the DMZ, take a short ride on a motorized, enclosed train. Most DMZ tours from Seoul bring you to the Third Tunnel of Aggression. They typically combine the tunnel with a visit to Dora Observatory, where you can look at North Korea using telescopes, and the DMZ Exhibition Hall, filled with historical artifacts and photos. Some go to Panmunjeom, a venue for talks between South Korea and North Korea.

• The dark, narrow tunnel is not recommended if you suffer from claustrophobia.

• Bring your passport; you’ll need it if your tour visits certain areas of the DMZ.

• You can’t take photos in the tunnel—photography and filming are strictly prohibited.

• Helmets are provided and must be worn at all times, as the ceilings are low and require almost everyone to crouch.

• Wear sturdy, waterproof shoes with a good grip.

The DMZ is 31 miles (50 kilometers) from the South Korean capital of Seoul; it takes 1-1.5 hours to reach by road, depending on traffic. Sometimes, the train doesn’t work, and you’ll need to walk down and back up to ground level; this can be physically exhausting and is only recommended if you're physically fit.

The Third Tunnel of Aggression follows the same hours as the DMZ. It’s open seven days a week, year-round, from morning until late afternoon. The DMZ may close with short notice in the event of political emergencies and closes on some South Korean public holidays. It’s best to visit as part of a tour, as your guide will know which attractions are open.

If you want to learn more about the Korean War and how it contributed to the establishment of North and South Korea, visit the War Museum of Korea. This enormous cultural center documents the Korean War through multimedia exhibits and artifacts such as uniforms and weapons. There’s also a moving war memorial outside and walls inscribed with the names of fallen soldiers from around the world.