Lũng Cú Flag Tower (Vietnamese: Cột cờ Lũng Cú) is a monument in northern Vietnam. It is located in Lũng Cú commune of Dong Van district in Ha Giang province. The monument consists of a 30tallNaNtall tower on the summit of Lũng Cú Peak (over above sea level). The tower is topped with a large Vietnamese flag. The monument was built to mark the northernmost point in Vietnam, although the farthest north point on the Chinese-Vietnamese border is actually located over 3.3km (02.1miles) farther north.