公园内瀑布景观丰富，集中分布在黄满寨峡谷上游。其中，飞虹瀑布是黄满寨瀑布群的一级瀑布。飞虹瀑布，宽82m、落差56m，以排山倒海之势、雷霆万钧之力气撼山岳，被誉为“岭南第一瀑”。

The waterfall landscape in the Geopark is rich, mainly distributed in the upper reaches of Huangmanzhai gorge, among which, Rainbow waterfall is the first-step waterfall in Huangmanzhai waterfall group. Rainbow waterfall, with a width of 82m and a drop of 56m, is reputed as "The First Waterfall in Lingnan".