Introduction to the open-air hot spring pool: The open-air hot spring pool has 12 special pools including bird singing, warbler singing, and drunken shade. The open-air swimming pool hidden deep in the shade of trees is full of wild charm that returns to nature. The sun shines on the earth, and the clear, thousand-year-old water hot springs reflect the fine scales in the green jungle. Stand in the open-air soaking pool, which is like a fairyland on earth, listen to the chirping of cicadas, smell the fragrance of flowers, and enjoy a quiet Zen life.