Introduction to the Little Three Gorges: The Little Three Gorges in Wushan is located on the Madu River, a tributary of the Daning River at the Dicui Gorge. It is the collective name for Changtan Gorge, Qinwang Gorge and Sanzhan Gorge. The Wushan Small Three Gorges is only 5 kilometers long. Because of its narrower waterway, the mountains appear particularly steep and the canyon becomes deeper and deeper.