《徐霞客游记·楚游日记一》
那山谷中，纷乱的山崖横贯交错，聚集排列形成山坞，山坞折了两个弯后东西横亘。山坞的崖壁下裂开个小洞，中间弯隆如同桥梁，从梁下向北望去，别有天地，穿过石梁进去，上面又裂开一层崖壁。我从东面的山坡向上爬，直攀到那石梁中何而停止，攀登起来如同登临一座重叠高耸的楼阁一样。
其谷乱崖分亘，攒列成坞，两转而东西横亘，下开一窦，中穹若梁，由梁下北望，别有天地，透梁而入，梁上复开崖一层，由东陂而上，直造梁中而止，登之如践层楼矣。
In that valley, the chaotic cliffs run through and intersect, gathering and arranging to form a mountain dock, which is horizontally crossed after two bends. There is a small hole under the cliff of the mountain dock. The middle part is arched like a bridge. Looking north from the beam, I have a new world. I climbed up from the hillside in the east and stopped when I climbed to the middle of the stone beam. Climbing up is like climbing a lofty building.