Llan Ffestiniog, also known as Ffestiniog or Llan is a small town in Gwynedd, traditional county of Merionethshire, north Wales, lying south of Blaenau Ffestiniog.
Attractions near the town include the Rhaedr Cynfal waterfalls and the remains of the Tomer-y-Mûr Roman fort and amphitheatre. A decomissioned nuclear power station lies south of the town at Trawsfynydd.
Ffestiniog Railway