Tour operators, resort developers and investors routinely take geopolitical, security, health and safety and other factors into account when making long-term decisions about tourism development in destinations. But often little or no weight is given to sustainability and the long-term impact of tourism operations on the destination. For example, this could include whether the local water supply will meet the future needs of tourists and residents, or how increased waste or energy demands will be managed. We developed a tool to identify potential environmental and socio-economic risks in a destination and partnered with TUI to trial it in two destinations.