Swallow Cave is 1,500 meters in depth, located at Luofan Village, Yanjia Town, 27 km from Ceheng County. The front cave is Guojia Cave while the back one is Swallow Cave. There are 4 groups of red frescos on cliffs and the largest one, covering an area of 1.1 square meters, has different symbolic characters. These characters haven't been cracked yet. 

Guojia Cave is a karst cave with abundant stalactites inside. It is 7 km long and 1.5 km extends towards Swallow Cave. There are many swallow nests in the cave and tens of thousands of swallows, so it's well known as Swallow Cave. There is also a 1,000-square-meter lake running in front of the cave, where people can go boating and fishing.