The village of Treaddur, or Tre Arthur, is situated in a rocky coastal area with sandy inlets on the west side of Holy Island off the island of Anglesey. From the early 20th century the area has been a popular tourist destination.

The nearby Prehistoric settlement complex at Porth Dafarch (NPRN 56021) was explored in 1875-6 and part was re-excavated in advance of road widening in 1939. Settlements of this kind in Anglesey are traditionally known as Cytiau'r Gwyddelod or 'Irish folks' cottages.

RCAHMW, 2013.