Emperor Khải Định who ruled 1916-1925, has chosen slope of Chau Chu mountain, 10 km from Hue, as the location to build his tomb (Mausoleum of Emperor Khai Dinh). The construction of the tomb was started on 1920 and lasted for 11 years.
Emperor Dục Đức’s burial ground is a small complex that also includes the graves of Emperors Thanh Thai and Duy Tan. Emperor Duc Duc was the 11th emperor of the Nguyen Dynasty in Vietnam. Interestingly, Duc Duc was imprisoned by the court for being a Francophile and he died after reigning only three days in 1883. He was born on September 2, 1852, in Hue, the capital city of Vietnam at the time.
Nam Giao Esplanade (Đàn Nam Giao) - The three-terraced heaven and earth esplanade - was constructed in 1806 where the Nguyen emperors held heaven and earth ceremonies in the spring every three years for the welfare of the country and the stability of the dynasty.
Chin Ham Historical Site (Khu Di Tích Lịch Sử Chín Hầm), also known as Nine Tunnels, is a historical site in An Tay ward, Hue city, about 6 km south of the city center, at the foot of Thien Thai mountain. It's called Nine Tunnels, but actually there are only 8 cellars and an attic. This is the area where the treasure of war materials and weapons was built by the French army in 1941.