The swallows are about 35 kilometers northeast of the Great Shennongjia. High and sturdy, green and picturesque, 2400 meters above sea level. It faces the north and south of Tianmen, and it is next to the Zizhu River Valley, the throat of the traffic between the west and the west of the Han River. On the west side of the entrance, there are buildings such as Huixian Bridge, Observation Deck, and Yan Dance Pavilion, which are specially designed for visitors to watch. Huixianqiao passed down for Yandi Shennong to meet with Taishang Laojun, and advised Laojun to reform Dan as the land of metallurgical furnace. The cedar of the bridgehead was warm and proud, and the forest under the bridge was primitive and ancient. The famous swallow hole is located between the mountain walls on the right side of its canyon. The entrance is wide, the front is the hall, the height is more than 20 meters, and the width is thousands of people; the right is the secluded hole, the front is straight and the back is curved, gradually narrowing and darkening; the left is the heavenly hole, the diagonal is through the wall, the sunlight is transmitted; Nearly round, 2 meters high, unfathomable. The stalactites droop in the cave, the stalagmites stand erect, the dripping is endless, and the creaking sounds. What is even more bizarre is that there are thousands of swallows perennial in spring, summer, autumn and winter, and their nests and cliffs are famous for their names.