The relationship between heritage and tourism at Word Heritage Sites is thought to be particularly problematic. Yet, each year more heritage sites gain this status. This paper explores the issues that emerge between tourism and heritage at two heritage sites, one with World Heritage listing and the other embarking on the application process. Interview data were collected in relation to the Royal Exhibition Buildings and Carlton Gardens (REB), Australia and Oamaru's Historic Precinct, New Zealand; secondary data were used to contextualise the findings. The findings of the two case studies indicate that the process, and outcomes, of World Heritage (WH) status influence the nature of the relationship between heritage and tourism. The findings of this case study analysis indicated that prospect of WH listing seems to be a catalyst for decision-making and developing networks between the various stakeholders of heritage and tourism, but heritage stakeholders seem to be grappling for power at this time. Once the listing process is successful, heritage then seems to gain the balance of power, and tourism seems to be less successful in controlling the situation. Further research is warranted on this topic to explore whether the findings from two sites can be generalized to other heritage sites.