Today enjoy Halong Bay Cruise Ride (around 4 hours), the World Natural Heritage, thousands of islands with different forms look like glittering emeralds attached to the blue scarf of a virgin. The area where many stone islands concentrate has spectacular scenes and world-famous caves and is the center of Halong Bay Natural Heritage. View the Dramatic Caves and visit to Thien Cung Caves which recently discovered grotto is perhaps the most beautiful grotto in all Halong Bay. Enjoy seafood lunch on board. Upon finished, back to Hanoi.