Book excerpt: This book focuses on tourism sectors and models the latest trends in tourism activity while providing a new vision for contemporary tourism economy. Tourism is a sector confronting new challenges for advanced and developing economies. Despite global challenges, tourism continues to be a dynamic sector stimulating social and economic development. Moreover, many scientific challenges are identified in order to model and explain countries tourism sectors, regional and local conditions of tourism and territories sustainability. In addition, a set of models is provided in this book, contributing to a new vision for contemporary tourism economies, showing new tendencies in this sector and following a scientific approach concerning new policy design aimed at understanding and explaining a new philosophy carried out by governments in terms of the management of the tourism sector. On the other hand, the private sector of economic business opportunities considering the perspectives of tourism are also considered. This book serves as an excellent guide for agents either in public or private sector buildings on the associated scientific methodologies concerning their strategic planning. Therefore, the aim of the present book is to provide some contribution to the areas highlighted above.