Castell Bryn Gwyn2021-05-19T00:40:38Zjbeckertag:atlantides.org,2013:pleiades/52032e5e2da4a5960a89a354a1b602d0Castell Bryn Gwyntag:atlantides.org,2013:pleiades/52032e5e2da4a5960a89a354a1b602d02021-05-19T00:40:38ZCastell Bryn Gwyn is a circular Neolithic enclosure some 54 m in diameter that shows signs of re-use during the Iron Age and in the Roman period. The site is located on the Isle of Anglesey.53.178812 -4.298046