The Ben Hai River flows from the Truong Son Mountains towards the sea, crossing the landscape of Quang Tri Province. Following the Geneva Accords of 1954, it became the temporary military demarcation line separating Vietnam into northern and southern zones. Hien Luong Bridge, spanning the river, came to represent the division of families and communities during two decades of separation.

The bridge is particularly recognisable for its blue and yellow sections, which recall the colours used to distinguish the two sides during the period of division. The historic site also includes the flag tower, former border posts and exhibition areas that preserve the stories of life along the demarcation line. The bridge was destroyed during the war and later reconstructed to preserve its historical appearance, including the distinctive colours that have become central to its symbolism.

Today, Hien Luong Bridge and the Ben Hai River form a memorial landscape dedicated to peace and national unity. The site hosts commemorative ceremonies, including the annual flag-raising event associated with the reunification celebrations on April 30. Its significance extends beyond the physical bridge and river, offering an enduring reminder of Vietnam’s history, the hardships of division and the importance of peace.