Caer-y-Twr is the remains of an Iron Age hill fort on the summit of Holyhead mountain (Mynydd Twr) 220 metres in height. Due to its position, it did not need much additional defence, but it had a stone rampart on the northern and eastern sides enclosing an area of roughly seven hectares. The site of the hill fort now contains mostly rubble, but the walls can still be identified. Read More »