This book describes Hungarian karst areas and Hungarian karst research results. The chapters present the general characteristics of karst areas, their geology, their paleokarst, their hydrology, their surface and subsurface morphology (more significant caves are classified according to karst areas and their morphology and development is described), ecology and flora and fauna. This book also includes a separate chapter which deals with the history of Hungarian karst and cave research. Another chapter deals with theories that were made during Hungarian karst researches.