Caves are dark and mysterious. But they are also among the most marvelous wonders of nature. Limestone caves are especially beautiful. They are decorated with stone frostings that make them look like storybook kingdoms. But how were these wonders of nature formed? And what goes on inside caves? This fascinating book shows us how nature creates caves over many, many years. It shows us how caves are often home to birds and bats and skunks and rats and other creatures. Come with author David L. Harrison and illustrator Cheryl Nathan as they guide us into an amazing world that lies beneath the surface of the earth.