Introduction to natural lakes: Hongshi Gorge is divided into two sections, the north and the south. The two walls of the North Gorge are divided in the middle, and the upper part is a natural lake formed by the convergence of the Yuxi River. It is floating with gold and silver. A clear stream overflows the lake surface, forming a waterfall that flies down, and then passes through the grottoes on the west wall and goes south.