Famously being one of Vietnam’s seven UNESCO World Heritage Sites, the Imperial City of Hue has long been a must-see attraction for tourists visiting a hidden charm of Vietnam. The Imperial City of Hue was actually a walled fortress and palace belonged to the ancient city of Hue which was a capital city of the Nguyen Dynasty for 140 years date back from 1805 until 1945. The grandeur architecture was planned to be built in 1803 by Gia Long – an emperor who founded the Nguyen Dynasty. During 27 years from 1805 to 1832, the Imperial City of Hue was finally completed under the reign of Minh Mang, making it the most massive structure being built in the history of modern Vietnam involving thousands of workers, millions cubic meters of rock and huge volume of burden workload. It locates on the northern bank of Huong River, turning South with total land area of 520 ha.