一本の筋が岩場に刻まれている。知らなかったが，日本統治時代に水力発電所に関連して作られた道らしい。上流にダムがあるのか？　＠太魯閣 A path was engraved on the rock. I didn't know, but this path had been made for the survey of the hydroelectric power plant, during the Japanese era. Was there a dam at upstream of river? @Taroko national park