A visit to Halong bay would be incomplete without a visit to Trinh Nu grotto.

Trinh Nu Grotto was discovered by French explorers and given name “La Virgin”. It is situated on Bo Hon Island, sharing same location with Sung Sot Cave and about 10 kilometers far from Bai Chay Tourist Wharf to the south.

The grotto is separated into three chambers connecting by small windows. The first chamber is similar to a flat-roof house. In the middle of the room, there is a stone statue of a long hair girl looking to the ocean. The second one is smaller, just about 8 meters long, 5 meters wide and 4 meters high with numerous stalagmites and stalactites creating many skillful carving shapes on the wall. Arriving at the last chamber, in front of your eyes, diversified stalactites falling down from the roof makes beautiful pictures: a group of young lady; a phoenix with its wide wings, etc.

There is a love story about the girl statue in the grotto. It is said that the beautiful girl and a young fisherman in a village fell in love. While he was heading off far away to the ocean for fishing, she was compelled to get marriage with a rich man in the area. To keep promise with her lover, she ran away and stay in a cave to wait for him. The time passed and she was petrified when overlooking to the sea. For local people, the Trinh Nu Grotto represents the romantic love.