Hang Dau water tower is often called by the people of Hanoi Capital. Hang Dau Water Tower was built in 1894, along with Don Thuy Tower, during the colonial period, it was a place where the water supplier was mainly for officials, French soldiers and people in the downtown area.

Hang Dau boots and Hang Dau water tower are actually 2 separate works. Hang Dau boots are about 30m away from the tower, but the people of Hanoi look at the architecture of the tower like a bunker and have been held by French soldiers, so they are often referred to as a bean boot. Hang Dau water tower has a cylindrical shape with a diameter of 19m and 25m high; The roof has a cone -shaped roof, in the middle is a lightning column. The capacity of the water tower is 1,250m³.
Hang Dau water tower is built solidly like fortresses with thick stone walls and solid column system inside. The influence of French architecture, Hang Dau water tower has classic columns, decorative motifs of iron doors, stratified roller lines or interwoven shapes, creating a majestic and famous look for the water tower.
During the colonial period, the French colonialists called Hang Dau water tower because the tower was located at the beginning of Hanoi city, convenient to supply water to the area stationed in Thang Long citadel. During its existence, Hang Dau water tower has experienced many events. This is the place that witnessed an important event of Hanoi Capital, from the scene of welcoming the Liberation Army through Long Bien Bridge to the scene of seeing off the last French colonial soldier to Hai Phong train to Marseille.