St Donat's Castle is a historic fortress in Llantwit Major, Vale of Glamorgan, Wales, now home to UWC Atlantic, an international educational institution. While not open to the public for general visits, the castle hosts organized events including wedding and private hire services, corporate venue hire for conferences and team building, and community arts and entertainment events. The venue offers outdoor learning activities and serves as a backdrop for special occasions. Access is restricted to event attendees to balance community engagement with student safety at the educational facility.