What are the three wonders of Jianshui Swallow Cave?

There are three wonders in Jianshui Swallow Cave: ancient cave wonders, bird's nest wonders and stalactite hanging tablets wonders. The swallow cave in Jianshui is rich in ancient karst landforms, including stalactites, stalagmites and other natural landscapes, forming the wonders of the ancient cave. Jianshui Swallow Cave is the habitat of wild swallows, and its bird's nest is of high quality and enjoys a high reputation. There are also exquisite stalactites and hanging plaques in Jianshui Swallow Cave, which forms a spectacular scene of stalactites hanging plaques, and * * * has created the name of Jianshui Swallow Cave.