 The ancient parish of Llanwynno (or Llanwonno) included Abercynon, Penrhiwceiber, Ynysybwl, most of Mountain Ash, part of Pontypridd (the area north of the River Rhondda and west of the River Taff), Porth, Stanleytown, Ynyshir, Wattstown and Blaenllechau in the Rhondda.The mountainous area is easily reached on foot or by car, using mountain roads, which lead to Penrhiwceiber, Mountain Ash, Ferndale, Ynysybwl, and Pontypridd.The legendary athlete Guto Nyth Brân (1700–1737) is buried in the churchyard.