《徐霞客游记·粤西游日记五》
洞前的钟乳石柱缤纷交呈，不比白龙洞差。上边刻着 玄岩 ，字写得十分古朴。出洞后，吃过饭后雨停了。
仍二里出大道，傍十里铺，饭而雨霁。
The stalagmite pillars in front of the cave are colorful and varied, not inferior to those in Bailong Cave. The words "Xuan Yan" are engraved on the top, and the characters are very ancient. After leaving the cave and having dinner, the rain stopped.