Travelers are voting Son Tay Citadel and Dien Hai Citadel as the best forts in Hanoi. There are 1 fort in Hoa Binh a city just 36 km from Hanoi and 1 fort in Hoa Lu Ancient Capital which is 54 km distant. The most popular of these are Son Tay Citadel in Hoa Binh and Citadel Of The Hồ Dynasty in Hoa Lu Ancient Capital. You can find 3 forts in Red River Delta and 5 forts in the country of Vietnam. Our members favorite in Red River Delta is Son Tay Citadel and Quang Tri Citadel is the top pick in Vietnam. Want more? Check out our map of forts in Hanoi.