The natural stone bridge is located on a branch road to the Emerald Lake, another famous attraction in Youhe National Park. The formation of the natural stone bridge is because the rushing kick horse river water flow here encounters limestone, the water flow through the stone block, over the waterfall, but kick horse river water must pass through the stone, after thousands of years of persistent erosion erosion, The water is hard to break out of a natural hole in the rock. As the erosion benchmark declines, the erosion force increases, and the hole continues to expand, eventually becoming the natural bridge of today.