It were built to a depth of 30 metres and were fully equipped for subterranean life, including wells, maternity rooms, kitchens, and family living areas. It is the really famous place during Vietnam war. We also stop on the Hien Luong Bridge and Ben Hai River which marks the 17th Parallel which is where the Geneva Accords of 1954 partitioned the country into a northern and a southern zone. Relax and have lunch in Dong Ha before heading to Hue about 3pm-4pm / overnight in Hue