Dragon Palace Introduction: is the largest hall in the cave, majestic and large-scale. There are four sea-holding pillars in the hall. The four giant pillars are lined up like four strong men, supporting the roof of the Dragon Palace. They have remained motionless for thousands of years. The size of the pillars is rare in real numbers, and the four giant pillars are very rare. The shaped stone pillars grow side by side, which is even more amazing in the world.