This chapter delves into the pivotal role of heritage interpretation in promoting sustainable development within the context of Indonesian tourism. Heritage interpretation is purposeful communication, connecting visitors and natural or cultural resources. Through various principles and engaging techniques, interpretation lets visitors grasp these resources’ significance personally. It is an effective tool for conveying essential messages, particularly sustainability-related ones. By creating meaningful and engaging experiences, interpretation elevates the quality of visitor interactions, fostering understanding and appreciation and preserving Indonesia’s rich heritage—a condition crucial for sustainable tourism and development. The chapter employs autoethnography to explore the role of interpretation in conveying sustainability messages and supporting sustainable tourism. It investigates the processes and outcomes of three case studies involving interpretation development in Indonesia, utilizing qualitative analysis of visitors’ and interpreters’ reflections. The research findings suggest that the proper development and implementation of interpretation influences the quality of visitor experiences and immediate intention behavior and shapes the attitudes of interpreters, their resources, and broader global concerns. This represents a prerequisite for sustainable development.