Karst formations are unique landscapes created by the dissolution of soluble rocks, such as limestone, gypsum, or salt. This process occurs over thousands of years, leading to features like caves, sinkholes, and underground rivers. The chemical reaction between water and these rocks results in the gradual erosion of the surface, creating distinct topographical features. These formations are often found in regions with abundant rainfall, which enhances the dissolution process. Karst topography can support diverse ecosystems and is important for groundwater storage. Famous examples include the Carlsbad Caverns in the United States and the Grotte de Lascaux in France, showcasing the beauty of these natural wonders.