天生桥是因地下河水长期侵蚀岩层 ,导致河流上层及两岸岩石溶蚀、塌陷 ,独留中心一段横跨两边岩墙的岩体或石块而成 ,是地下水精工雕刻而成的地质“艺术品”。在不少丹霞或岩溶风景区中都可见到“天生桥”景观 ,但多为单体。据地质专家介绍 ,广西、贵州、云南等喀斯特地貌区是 Tianshengqiao is a geological “artwork” of groundwater sculpted by groundwater because Tianshengqiao has long been eroded by underground river water, leading to erosion and collapse of rocks in both upper and lower reaches of the river. In many Danxia or karst scenic area can be seen in “natural bridge” landscape, but mostly single. According to geological experts, Guangxi, Guizhou, Yunnan and other karst area is