Cities need sustainable tourism more than ever. Too often sustainable tourism discussions focus on small scale, nature-based tourism. It is critical to remember that sustainable tourism principles can be applied to all parts of the tourism system. Indeed, although the pandemic has silenced many of the concerns about overtourism, sustainable tourism in urban destinations has never been more important. That is not to say it will be easy. Implementing sustainable tourism is a wicked problem. What does that mean? Wicked problems, like sustainable tourism, are complex, with many actors...