Climb 205 steps to the cave where a dowager empress became a nun
Empress to two dynasties, then a nun
A cave pagoda in an enclosed limestone bowl 400 metres from the east gate of the Dinh Tien Hoang temple, immediately against the line of the old eastern rampart. It is marketed as Tuyet Tinh Coc; people who know the history call it Am Tien.
Why it's unique
Duong Van Nga was empress to Dinh Tien Hoang and then to Le Dai Hanh, the only woman to have been empress to two successive Vietnamese dynasties. The official heritage board states plainly that this is where she took religious vows at the end of her life.
The same enclosed valley was, by tradition, the Dinh court's execution ground, and the lake below is remembered as a pond where crocodilians were kept. A single karst bowl that served as both a capital's place of execution and the retirement cloister of that empress is a specific historical coincidence rather than a generic beauty spot.
Before you go
Two things almost everyone misses. The pagoda is 205 stone steps up the cliff face, and the great majority of visitors stay at lake level taking photographs and never climb, so the shrine itself is quiet. And the cave is shaped like a dragon's open mouth, which is its other name, hang rong.
The pagoda enshrines the Zen master Nguyen Minh Khong alongside the Buddha, the same monk attached to the old Bai Dinh cave pagoda, which links the two sites. The lake is clear to the bottom and holds a locally named perch and turtles.
It is ticketed separately from Hoa Lu and the price is not on the board's published page, so confirm on site. The climb is steep and slick after rain. Treat the modern romance legend attached to the branding as branding.