Highly recommend the half day tour to DMZ and Vinh Moc tunnels from Hue if you don't have a full day available. Our guide Huy and driver Duc picked us up on time at hotel in Hue and we travelled in a private car to the North South border and crossed the bridge on foot. Huy gave us an interesting history of wars in Vietnam and was very knowledgeable and answered all our questions. We then travelled to the tunnels and watched a fascinating history of the tunnels before walking through. Really amazing story of courage and persistence of the Vietnamese people.