The Sydney Opera House is one of the most recognized tourist icons in the world. The open and expansive venue created challenges for those tasked with undertaking a significant, costly renovation and restoration initiative. KCG was engaged during the planning stage to create a quantitative guest arrival and visitor flow model. KCG built and validated the model using external data sources plus pinpoint location and time stamped counts of over three million guests. The result was the most comprehensive arrival and visitor flow model of its kind, which l resulted in developing an optimal visitor flow plan for this UNESCO World Heritage Site.