Caer y Twr

This is the site of an Iron Age hillfort is on the summit of Holyhead Mountain. It has a commanding position over the Irish Sea and the remains of a large stone rampart on the east and north sides. There is also the remains of the base of a subsequent Roman stone watchtower. The site is west of Holyhead in Anglesey toward South Stack where a path to the summit of Holyhead Mountain can be taken.

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