Natural Stone Bridge is another famous scenic spot in Youhe National Park, which is located on a branch road to the direction of Jade Lake. The formation of natural stone bridge is because the galloping Kimar River flow encounters limestone here. Originally, the water flows through the stone barrier and becomes a waterfall. But the Kimar River water has to pass through the stone. After thousands of years of persistent erosion, the water flows through a natural hole in the rock. As the erosion benchmark declines, the erosion force increases, and the holes continue to expand, finally becoming today's natural bridge.