Huế is a city in central Vietnam that was the seat of Nguyen Dynasty emperors and the national capital from 1802 to 1945. A major attraction is its vast, 19th-century Đại Nội Citadel, surrounded by a moat and thick stone walls. It encompasses the Imperial City, with palaces and shrines; the Forbidden Purple City (Tử cấm thành), once the emperor’s home; and a replica of the Royal Theater.

Đại Nội Citadel

Another attraction is the Tomb of Khải Định, officially Ứng Mausoleum, is located in Chau Chu mountain near Huế in Vietnam. It was built for Khải Định, the twelfth Emperor of the Nguyễn dynasty. It was built from 1920 to 1931 taking 11 years to complete. The tomb is a blend of Western and Eastern architecture. It is located on a steep hill outside of the capital city of Huế.

Tomb of Khai Dihn,

Update

At night there is an open air market along the Perfume river: food and knick knacks.  When I was there on the 3rd of July the temperature was still over 30C after 8.00pm