Aerial view of Du'an Subterranean River National Geopark. Located in the slope zone from the Yunnan-Guizhou Plateau to the Guangxi Basin and the central and western part of the exposed karst area in northwest Guangxi, Du'an Subterranean River National Geopark covers an area of 210 square kilometers. The geological relics and the Disu subterranean river system constitute a comprehensive geopark, …
