On day 3, venture out of Zhenyuan to visit the nearby Black Dragon Cave. This natural limestone cave is filled with stunning stalactites and stalagmites, creating a magical underground world. Explore the various chambers and marvel at the unique formations. Afterward, head to the nearby Miao Village to experience the rich ethnic culture of the region. Interact with the friendly locals, learn about their traditions, and enjoy traditional Miao cuisine. Return to Zhenyuan in the evening and relax at a local teahouse.