《徐霞客游记·楚游日记二》
那通往大洞的孔穴曲折而有缝隙漏着光，孔穴中如另有一间开着门的、有栏杆的小屋子，从那里回身观看水流捣入的态势，也很奇异。
其窍宛转而披透，其窍中如轩楞别启另开一门，返瞩捣入之势，亦甚奇也。
The hole leading to the big cave is tortuous and has cracks leaking light. In the hole, it is like another small house with a door open and a railing. It is also strange to look back from there at the water flowing in.