The Vale of Glamorgan ( ), often referred to as The Vale, is a county borough in Wales, bordering Bridgend, Cardiff, and Rhondda Cynon Taf. With an economy based largely on agriculture and chemicals, it is the southernmost unitary authority in Wales. Attractions include Barry Island Pleasure Park, the Barry Tourist Railway, Medieval wall paintings in St Cadoc's Church, Llancarfan, Porthkerry Park, St Donat's Castle, Cosmeston Lakes Country Park and Cosmeston Medieval Village. It is also the location of Atlantic College, one of the United World Colleges.