Taroko National Park Shakadang Trail Shakadang Trail is also known as "Mysterious Valley Trail" and was renamed to "Shakadang Trail" in 2001. This trail is built along the river cliff so travelers can easily observe both the rock folds and plant ecosystem beside in the river valley. After 4.1km you will arrive at 3D Cabin –phonetic sound Sanjianwu, which is the favorite of visitors. After the first curve there is a deep pool with clear water that has enchanted many visitors. In May, it is the season when Tung tree flowers bloom, making the trail a pleasant flower hallway with flowers filling the air like snow flakes.