Hi, I'm going to Hanoi this weekend. I'm planning to book a 2D/1N trip to Halong Bay. But looking at all the itineraries from different agencies, it seems like I have to make a choice between going to Thien Cung and Dau Go caves OR Sung Sot cave, since none of the agencies go to all 3. So, can anyone advise me whether I should go for Thien Cung and Dau Go caves OR Sung Sot cave? Which one is better?