《徐霞客游记·滇游日记二十五》
二里路，回头看见西边山崖的底下，有个小洞正在高险的山崖之下，朝向东方，吞吐着波涛洪流，心里认为很奇异。
二里，顾西崖之底，有小穴当危崖下，东向与波流吞吐，心以为异。
About three kilometers away, looking back, I saw a small hollow at the foot of the cliff to the west which faced eastwards below the precipitous cliff, surging with torrential waves, which I found very peculiar.