As part of your Halong Bay tour in Vietnam, you must visit
– Bo Hon island, popular islet to view the karsts from the inside in a series of limestone caves.
– Titov Island, for the panoramic views of the towering karsts scattered across turquoise waters.
– Hang Luồn where tall karst towers surround the caves and calm ocean waters in to a giant lake. Here you get to see stilt houses, floating communities and get into a kayak too!