The Virgin Cave (Hang Trinh Nu) is one of the most famous caves in Halong Bay.

It is probably best known for its shrine. Legend claims that a beautiful woman committed suicide in the cave, unable to return home after being forced to marry an old Mandarin. Here her body tuned into stone. Another similar legend says this girl escaped from a Mandarin that forced her to marry him because her father could not pay a debt. When fishermen found her body, they buried her here and built a small shrine inside the grotto.