On the northern bank of Perfume River has relics consisting of palaces, which were constructed as arc defensive ramparts with 11km length This valuable construction includes more than 100 architectural works which were extremely reflected the life of Emp. On the northern bank of Perfume River has relics consisting of palaces, which were constructed as arc defensive ramparts with 11km length This valuable construction includes more than 100 architectural works which were extremely reflected the life of Emperors and mandarins under reign of Nguyen