This Resource Manual has a specific purpose: helping to manage natural values within World Heritage properties. As such it is aimed at natural and mixed World Heritage properties as well as cultural landscapes (inscribed under cultural criteria). The intention is to help managers understand and incorporate World Heritage concepts and processes into natural site management. It is hoped that all natural World Heritage managers and staff will find useful guidance here and will be inspired to explore the many resources highlighted. Many of the management principles described will apply to any type of protected area, but here special emphasis is given to those management considerations most relevant to World Heritage status.