Taroko is famous for its spectacular mountains and marble canyons. Cliffs and canyons stretch along Liwu River. Four million years ago, the island of Taiwan was formed by the collision of plates. After millions of years of wind erosion, the marble rocks were exposed and cut by Liwu River, creating impressive grand canyons. From Qingshui to Nanhu Peak, the drop height is 3,742 meters. Such special geography has also bred special flora and fauna in this area.