Whether you are planning a visit to one of Indiana's tourist caves, looking to explore some of the state's wild caves, or just curious about Indiana underground, this compact and comprehensive field guide is the place to start. It explains how caves are created, the different geological features to be seen in them, and the types of animals that inhabit them. There is also plenty of practical information about safety and cave etiquette, equipment and caving organizations, as well as descriptions of individual caves and their history. The guide also includes a brief directory to help connect you with other cave enthusiasts--and their knowledge and experience. For those whose interests lie above ground, there are descriptions of the karst features that are such a prominent part of the Indiana landscape and how these features provide clues to what lies beneath.