Due to concerns over the further spread of Coronavirus and the well-being of our visitors, we regret to report that all Cadw unstaffed monuments and car parks will be closed from 5pm Monday 23 March until further notice. We do look forward to inviting people to once again enjoy these outstanding monuments as soon as we are able.
Northern military outpost in a strategic coastal location
Dating back to the 3rd century, Caer Gybi’s position on low cliffs overlooking the sea suggests it was part of a coastal network of defences, possibly linked to the late Roman watchtower at Caer y Twr on the summit of Holyhead Mountain.
The walls of this rectangular fort are extremely well-preserved, standing up to 13ft/4m high and 5ft/1.5m thick. You can also see remains of four corner towers. Occupying a vantage point above the harbour, the 26ft/7.9m north-east tower is the most prominent, though the top section is a later rebuild possibly dating to the medieval period.
For further information, please contact: Traveline Cymru on 0800 464 0000 or National Rail Enquiries on 03457 48 49 50.