Hang Dau Go is a natural wonder and one of the most beautiful caves of Halong Bay. It has intricate carvings and ancient architecture with many stone pillars and stalactites. The cave has a wide variety of flora and fauna, especially mosses, ferns, and wood trees. You can walk around and explore the different chambers. It takes 20-30 minutes to walk through and guides are available.
The cave has a historical meaning behind it's name dating back to when Vietnam fought the Mongols.