Fodor's Expert Review Cot Co (Citadel Flag Tower)
This 170-foot structure, Vietnam's tallest flagpole, is one of the symbols of Hue. It was originally built in 1807 to serve as the Imperial Palace's central observation post. Like much of Hue, it has a history of being destroyed. The Flag Tower was toppled during a typhoon in 1904 and rebuilt, then, destroyed again in 1947, and rebuilt anew in 1948. When the North Vietnamese occupied the city during the Tet Offensive of 1968, the National Liberation Front flag flew from the Flag Tower. The interior is closed to the public.