《徐霞客游记·游颜洞记》
洞底的水从西南的洞穴流来，在洞门内盘绕着向东流，又从东南的洞穴流去。
洞底水从西南穴中来，盘门内而东，复入东南穴去。
The water at the bottom of the cave flows from the cave in the southwest, goes around in circles in the cave and flows eastwards, and then flows out through the cave in the southeast