Karst topography is a term that describes an area that has caves, caverns, and sinkholes. Caves and caverns form in areas that have limestone bedrock. Limestone reacts easily with acids, like simple rain water. The chemical reaction between limestone and rain water causes the limestone to dissolve and form holes in the rock. The result is a network of caverns, caves, and sinkholes that have the ability to span over hundreds of square miles. Maybe one day you will get to go spelunking. This adventure will take you below the surface of Earth. Some of the features you will see are simply amazing.