The Flag Tower of Hanoi is a tower in Hanoi, Vietnam, which is one of the symbols of the city and once a part of the Hanoi Citadel, a World Heritage Site. Its height is 33.4 m.
Wikipedia https://en.wikipedia.org/wiki/Flag_Tower_of_Hanoi
Coordinates 21°1'57.161" N 105°50'23.313" E