The Vinh Moc tunnel complex in Quang Tri (Quảng Trị) is an underground network of connecting tunnels located on the border of North Vietnam and South Vietnam, in the vicinity of today's DMZ.

During the Vietnam War, the Viet Cong made use of several tunnel systems nationwide, which were of considered of enor-mous strategic impor-tance for their war effort.

The Vinh Moc tunnels however, were primarily built by the local people as a shelter against the intense bombing and had facilities such as a kitchen, a washing room, a health station, and a toilet. The total length of the tunnel complex is nearly 2,000 meters, with entrances both to the tops of the hills and some to the South China Sea.

Beside Vinh Moc, other tunnels can be found at Cu Chi (fig.) near Ho Chi Minh City and at Bach Ma (fig.), between the Hai Van Pass (fig.) and the city of Hué.