During the time of the Indochina War from 1954 until 1975, the Ben Hai River was established as the dividing line between North and South Vietnam, nominally described as being at “the 17th parallel”.
The Vietnam Demilitarized Zone (DMZ), situated nearly 100km to the north of Hue city, spans around a 5km2 area on either side of that line.
If you are fond of the Indochina War and wish to revisit the battleground and recall the history, taking a DMZ tour starting daily from Hue will be a perfect choice.
The area is comprised of a lot sightseeing places where historical events happened, such typically as Khe Sanh Combat Base (about 130km away from the city) - the US Marine Corps outpost, Truong Son National Cemetery - the biggest memorial to the Vietnamese soldiers killed along the Ho Chi Minh Trail, Vinh Moc Tunnels (about 110km away from the city) - much more similar to the Cu Chi Tunnels, the Rockpile - a karst rock used to be the US Army and Marine Corps observation post. Some of the sites can be finished together with a local guide within a day trip.
Whilst on the tour, tourists should follow instruction of local guides and beware of numerous unexploded ordnance devices.