《徐霞客游记·粤西游日记二十四》
南面山崖之下，有个洞朝向北方，洞口高高张开，洞内空阔，深得不知它的尽头；四面山崖上树丛蔓枝浓密，深渊底部更加浓密；山崖旁都有小径可顺着走，每条路走到深渊底下，却全都被遮蔽着不可前进。
南崖之下，有洞北向，其门高张，其内崆峒，深不知所止；四崖树蔓蒙密，渊底愈甚；崖旁俱有径可循，每至渊底，俱则翳不可前。
Under the mountain cliff in the south, there was a cave facing north, with a wide-open entrance; the cave was spacious, with an unknown depth; trees and vines were overgrown on the cliffs on all sides, and the bottom of the abyss was covered with dense vegetation; there were trails next to the cliffs, and each trail led to the bottom of the abyss, but all were blocked and impassable.