Located at Dong Da Ward, Qui Nhon City, and 3km from the city center, Doi Tower site was built in the late 12th century and early 13th. Here, there are 2 towers of 18m and 20m in height respectively. Both of them have got a special structure different from traditional, multi-storey towers. They are composed of two main parts: the square-shaped body and the similarly curved roof. Besides the aforesaid towers, in Binh Dinh Province there are also Phu Loc Tower located at Nhon Thanh Commune, An Nhon District (35 km northwest of Qui Nhon City), Thu Thien Tower in Binh Nghi Commune, Tay Son (35 km from Qui Nhon City), and Binh Lam Tower in Phuoc Hoa Commune, Tuy Phuoc District (22 km from Qui Nhon City) which was built between 11th and 15th century in the time of the Champa Kingdom.