The first part of this book examines the genesis, occurrence, exploitation and management of mineral and thermal water resources, approaching the subject from the hydrogeologist’s point of view, but also dealing with engineering and therapeutic applications of water resources. The second part of the book contains case studies of specific geothermal and spa sites in several countries, including Romania, Iceland and the UK, written by hydrogeologists with a specialist knowledge of these areas. This section illustrates the diversity of mineral and thermal water resources worldwide, and highlights different international management philosophies of these resources.