Khe Sanh Combat Base South Vietnam was in the corner of Quang Tri  Province 18 miles south of the DMZ and 8 miles east of Laos in   mountain terrain. The base was a blocking position to stop the North Vietnamese Army or NVA from moving men and supplys into the south along Route 9. An air strip for resupplying troops and for recon flights over the Ho Chi Minh trail.
 

Quang Tri Citadel is situated in the central of Quang Tri Town. This is a military bastion and it is also an administrative head office of Nguyen Dynasty in Quang Tri Province from 1809 to 1945.

Quang Tri Citadel was built in 1824, during the 4th year of the reign of Minh Mang. The citadel should be approximately 60 km in the north of Hue.
 

One of the most intriguing sites that we visited during our tour of the DMZ was the Vinh Moc Tunnels, located on the northern side of the DMZ along the coast of the South China Sea.  The village of Vinh Moc found itself tragically positioned in one of the most heavily bombed areas of North Vietnam.  In order to escape this bombardment, the villagers constructed approximately 2.8 km of underground tunnels which they used as a refuge to survive the bombings.  The tunnels were built in three levels (12, 15 and 23 meters deep) and took thirteen months to complete.  Three hundred people lived intermittently in the tunnels during 1966 to 1971.  Sixty-two families made the tunnels their home and amazingly seventeen babies were born here and spent the first years of their lives underground.