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.
Hanh Cave has the length of 1.300 meters, runs along lime-stone mountain range of Quang Hanh. This is a low cave so if you want to visit the cave, you have to wait until low tide and then hire a boat. Visiting the cave is only for those who love adventure. Before entering the cave, you must carry torches or flashlight and remember to go out of the cave before the tide rising.
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.