Yuedong, a natural stalactite cave with a 5 m deep lake inside, located in Fengpin Township, with Shitiping to its south and about 1 km from Gangkou Village. The water of the lake inside rises with the waxing moon, which is how it got the name "Yuedong" (Moon Cave), or"Yuejing" (Moon Well). Legend has it that a thousand-year-old aggressive eel lives in it;, therefore no one has ever yet dared to dive in. Yuedong is about 80 m above sea level, and 800 m away from the coast. The entrance of the cave is about 25 m wide and the cave is 176 m long. The shape of the cave is unique: there are two rooms in the cave; the left one has a 50m, rather wider entrance and gradually gets narrower as it reaches the top, where hundreds of thousands of bats inhabit, only adding more mysterious charm. The room on the right side is about 40 m deep.It is quiet and dark in the cave, and stalactites can be seen everywhere, as well as bats hanging upside down. If you want to explore inside, boats are available. The average temperature inside the cave is about 20℃. The cave is warm in winter and cool in summer, which makes it suitable for a visit all year round.