Featuring karst landscapes, Lianzhou Underground River is a well-known tourist attraction in southern China. The stalactites in the karst cave, which took shape after hundreds of thousands of years, are appealing to travelers. | China Xinhua News

KARST TERRAIN Karst terrain refers to a distinctive type of landscape formed primarily from the dissolution of soluble rocks such as limestone, dolomite, and gypsum. This process creates unique landforms on the surface and underground, due to chemical weathering and erosion by slightly acidic water (mainly rainwater containing dissolved carbon dioxide). FEATURES OF KARST TERRAIN 1. SURFACE FEATURES (Exokarst): • Dolines (sinkholes): Depressions formed by collapse or dissolution. • Uvalas: Large