Original vestige unearthed at the Hai Van GateVietNamNet Bridge – An excavation on the Hai Van Gate complex on the 490m above sea level Hai Van Pass has unveiled a clear layout of the old foundations of citadel walls and a section of the north-south route dating back to 1470. An overall view of the Hai Van Gate complex at the top of the Hai Van Pass. North Gate of the Hai Van Gate relic on the Thua Thien-Hue Province side. A brick built foundation was unearthed on the Hai Van Gate relic on the top the 490m above sea level Hai Van Passs. The Hai Van Gate, situated at the top of Hai Van Pass, is a complex of brick-built gates from the 19th century, and octagonal bunkers from the French colonial period.