敢沫岩又称黎明通天河，中国地质学会洞穴研究会会长朱学稳教授于2004年为敢沫岩提名，“敢沫”在壮语中的即为“有水的溶洞”。是以地下河为主干的洞穴系统，有6个洞口、上-中-下3层，属通道厅堂结合式岩溶洞穴，以地下河通道串联洞穴大厅。敢沫岩规模宏大、气势壮观，洞内的化学沉积物种类齐全，与其他溶洞对比，敢沫岩洞穴大厅面积大、高度高，洞内地质遗迹丰富且珍贵，具有较高的科学价值和美学价值。

Ganmoyan is also known as Liming Tongtian river. Professor Zhu Xuewen, the president of the Cave Research Association of Geological Society of China, inscribed Chinese characters “Gan Mo Yan” in 2004 at the entrance of Ganmoyan. “Ganmo” means a karst cave with water in Zhuang. It is a cave system with underground rivers as its main part and has 6 holes divided into 3 layers of upper-middle-lower. It is a comprehensive karst cave with cave passages and halls. The Ganmoyan is magnificent and spectacular, with a variety of chemical deposits in it. Compared with other caves, the Ganmoyan cave hall is large and its height is high. The geosites in the cave are rich and precious, with high scientific and aesthetic value.