In Kenya, tourism is the second largest source of foreign exchange revenue following agriculture; it however, faces numerous challenges of sustainability due the complex nature of tourism destinations. Tourism destinations are complex and dynamic systems that involve various stakeholders each with different understanding of same tourism system. These different perceptions can be tapped to develop a common tourism model that helps achieve the overall sustainable tourism development objective of a given destination. This paper describes participatory systems approach to develop a shared understanding amongst stakeholders of the tourism system in Dunga Beach and Wetland, in Kisumu County, Kenya. The process includes the development of a systems model that represents a holistic understanding of the interconnectedness and relationships between the various components that affect sustainable development of tourism in Dunga. The model is intended for use as a framework for enhancing ecotourism experiences by stakeholders who are service and experience providers in Dunga for the satisfaction of tourists at the site.