The Penguin Hall has the Japan's biggest ceiling aquarium. Almost all of the ceiling of the first floor is made of aquarium, so the visitors can observe swimming penguins from beneath the aquarium. Elephants and other animals can be observed in the zoo. Also many kinds of plants can be seen - especially the rose garden is very famous. In the season of roses, "Rose Festival" is held in the rose garden full of fragrance of the roses. (May and October)