14h00 - 14h15: Visiting the Surprising cave, one of the most beautiful ones in Ha Long Bay. In particular, the second compartment suddenly expanded immensely with curved domes printed in streaks of very smooth and smooth hats, wholly over the head like a large, wide theater. This is the hugest and most beautiful cave in Halong bay, locates in the core area of the heritage site. 15h00 - 15h15: Enjoy kayaking or bamboo boat rowing at Luon Cave area, a farther scenery of the bay. Get on Titop island for swimming or climb up to the top mountain to take Halong Panorama 18:00 Back to Tuan Chau Harbor. Get on the bus back to Ha Noi on the new highway with a high-quality bus. 20:50 Arrive in Hanoi and finish the trip.