After 15 years of summer vacation, I think of commenting on it. In fact, the scenic spot is very good. Summer vacation is the best place for children to play. Firefly Cave is an underground river for tourists to take boats to play on the river. There are many fireflies in the dark river of the black hole. They are very beautiful. They are very worthy of children's play! ________ And Butterfly Valley, all kinds of butterflies are beautiful!