Hang Trinh Nu or the Virgin is also known as Mid Gate cave. According to local lore, an old couple lived here long ago. The husband made a living fishing around the bay. They were very poor. They had only one daughter. She grew up to be a beautiful young woman, so beautiful that people from all around knew of her. There were many suitors and her reputation reached the local mandarin. The mandarin immediately sent his soldier to her home to capture her. She was forced to marry the old mandarin.

After much cajoling and threats the fair maiden still steadfastly refused. One day, she escaped from the mandarins home, however she was afraid to return home for fear of retaliation. After much thought, the maiden decided to go to Mid Gate cave to commit suicide. Her body turned into the stone statue lying atop a flat surface. Since then, Mid Gate cave became known as Virgin cave.
Virgin cave tunnels through the middle of an island approximately 2 km long. Along the tunnel, there are many chambers. Each is famous for a different reason. All are unique in their beauty. Many visitors to the cave are awed by its beauty and so the name Hang Sung Sot was given to the outer chamber of the Virgin cave. Sung Sot literally means astonishment or awe.