Despite all this, it isn't geology that gives the Eight Immortals Grotto area its fame, but rather the archaeological sites of prehistoric settlement. Archaeologists have uncovered Stone Age artifacts in at least three of the caves. These are thus far the earliest indications of settlement in Taiwan, which scholars have christened "Changpin Culture."
考古學家分別在潮音洞、海雷洞、永安洞發掘出石器時代的史前文物，這是台灣目前為止所發現最早的人類生活遺跡；學者稱之為「長濱文化」。