Historic Knucklas Knucklas (Welsh: Cnwclas, “Green Hill”) and Heyop (or Heyope) are two small but inseparable villages in Powys, Wales. They lie off the B4355 road and are served by Knucklas railway station on the Heart of Wales Line. Both are approximately 2 miles (3.2 km) from Knighton and lie in the … [CLICK TO READ MORE]