Made of limestone and fronted by a small waterfall, the cave must be squeezed in through by a tiny entrance. Once inside, we find ourselves 20-30 centimeters (8-12 inches) deep in water, and raingear is recommended.
花崗水上青舊稱「花崗水濂洞」，為一石灰岩地質的石洞；洞口低矮狹窄，體重超過標準的人很難「擠」進去，還有一「水濂」﹘ ﹘小瀑布把關，洞內又積水二、三十公分，最好穿雨衣，免遭「洗」禮。