Health and wellness tourism is booming all over the world. The by-products covered by this segment of tourism are: acclimatisation, thalassotherapy, spa tourism, medical tourism, aesthetic tourism, assisted living residences, as well as accessible/inclusive tourism. Due to profound climate change, the ecological balance of the blue planet has worsened. In this book, the authors emphasise the profound interdependence between human health and well-being and the health of nature. The ethical perspective of health and wellness tourism is analysed, aiming for excellence in health procedures and the safety of users/tourists and residents, as well as tourism sustainability. Based on the bibliography studied, more than three hundred and sixty books from different subject areas and on study visits to various tourist destinations, it takes a holistic, inter/transdisciplinary, complex and ecological approach to health and wellness tourism. This book is essential for those who authorise, supervise, design and manage health and wellness tourism enterprises, namely: health technicians, tourism experts, entrepreneurs, decision-makers, teachers and students.