Castell Bryn Gwyn - Credit: Wikimedia Commons
Castell Bryn Gwyn - Credit: Wikimedia Commons
Castell Bryn Gwyn is a prehistoric site on the Isle of Anglesey, west of Brynsiencyn. It is a circular clay and gravel bank covered with grass, still some 1.5 metres (5') high and revetted externally by stone walls, which surround a level area some 54 metres (177') in diameter. Its name means "White Hill Castle". Read more on Wikipedia
Source: en.wikipedia.org