Hanh Cave is located at the foot of Quang Hanh Lime-stone Mountain, about 20 kilometers far from Bai Chay Tourist Wharf. Hanh Cave is not only the most beautiful but also the longest cave in Halong.
Inside the cave, there is a temple which called Tam Co temple (Three Girls temple). There are rumors that 3 beautiful virgins were get lost in the cave and died here. Thus, local people built this temple in order to comfort their soul.