In 1992, after a survey of pleiones along the Mienyueh branch line, the Taiwan Forestry Bureau (TFB) designated a Taiwan Pleione Nature Reserve there under the Cultural Heritage Preservation Law, and allowed tourists access to admire the flowers. It was only then that people in Taiwan realized that on their own island there was still such a "lonely valley of the orchids."
民國八十一年，林務局調查眠月線鐵路沿途一葉蘭的生長情形後，依據文化資產保存法公告了「台灣一葉蘭自然保留區」，並將之規劃為景點，提供遊客賞花，台灣人也才知道寶島還有這一片空谷幽蘭。