Abergwesyn is a village in the Welsh county of Powys, in mid-Wales, at the start of the Abergwesyn valley and at the confluence of the Afon Irfon and the . It is 52 miles (84 km)from Cardiff and 158 miles (254 km) from London. Abergwesyn Commons stretch between the Nant Irfon valley and Llanwrthwl. They are rich in archaeology, including Bronze Age ritual sites and deserted medieval villages. A National Trust project is focused on the preservation of the peatland.