Royal tombs
Six garden tombs upstream. Tu Duc, Minh Mang, and Khai Dinh share the four-site ticket; Gia Long, Dong Khanh, and Thieu Tri are separate.
On the four-site ticket
Tu Duc’s garden, Minh Mang’s axis, and Khai Dinh’s compact tomb are on the four-site ticket with the Imperial City: 530,000 VND for an adult, valid two days from the first visit. Ride out by bicycle or taxi, and start early in the hot months.
Tu Duc Tomb Tu Duc’s garden tomb: Lưu Khiêm lake, the Xung Khiêm pavilion, and almost 50 buildings named for the word Khiêm. Keep this one if you keep one tomb. 
Tomb of Minh Mang One straight axis of about 700 m, from Đại Hồng Môn past lakes and pavilions to the burial hill, where two rivers meet to form the Perfume. 
Tomb of Khai Dinh The compact tomb on the slope of Ứng Sơn: climb the dragon stairs to the carved facade and the gilded statue of the king inside. Separate tickets
Gia Long, Dong Khanh, and Thieu Tri sell their own tickets. Dong Khanh sits beside Tu Duc. Gia Long is the farthest out, by boat or by road and the Kim Ngọc ferry.
Tomb of Gia Long The founder’s tomb, a family of tombs across 42 pine hills with no outer wall, reached by river boat or by road and ferry. 
Tomb of Dong Khanh Ngưng Hy hall beside Tu Duc’s tomb, begun as a temple to Đồng Khánh’s father. A short stop when you are already at Tu Duc. 
Tomb of Thieu Tri The only Nguyễn tomb that faces northwest, about 8 km out, with rice fields for a wall and the Perfume River in front.