There are several tombs of ancient emperors scattering along the Perfume River: such as Minh Mang, Khai Dinh, Tu Duc, Dong Khanh, etc. On Cam Khe Hill, Minh Mang Tomb was built in 1843, with the area of 18 hectare, 3-meter-high defended wall, and nearly 20 architectural constructions. Lying in the middle of a pine forest, Tu Duc Tomb belongs to Duong Xuan Moutain, 8km far from Hue.