《徐霞客游记·黔游日记五》
这里的山崖自南山往北接到北面的山崖，上边都是险峻四合的削壁，下面却从中分开通到西面，高处宽处都是东门的三倍，这便是西门。
其崖自南山北属于北崖，上皆削壁危合，下则中辟而西通，高阔俱三倍于东门，是为西门。
The cliff here extended from South Mountain to the north to meet the northern cliff. Above were precipitous and towering sheer cliffs, and below, it split off from the middle to lead to the west. The high and wide parts were triple the size of the East Gate. This was the west gate.