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Visitor Notice

Following the announcement of a short ‘firebreak’ lockdown by the Welsh Government as of 6pm on Friday 23 October, all Cadw staffed and unstaffed sites will be closed until further notice.

Until we can welcome you back in person, you can visit us virtually through our Open Doors Online 3D tours. All you’ll need is a mobile phone or a desk-top computer — of if you have a VR head-set you can be fully-immersed inside your selected adventure.

Please check our Latest News for further updates, sign up to our newsletter or stay in touch through our social media channels:

Facebook @CadwWales | Twitter @cadwwales | Instagram @cadwcymruwales

Diolch and we hope to see you again soon.

Overview

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.


Opening times

Daily 10am - 4pm

Last admission 30 minutes before closing

Closed 24, 25, 26 December and 1 January


Prices

Category Price
Admission
Free

Facilities

Dogs welcome icon No drones icon No smoking icon

Directions

Road
In Holyhead, overlooking the harbour, off A5
Rail
Holyhead

For further information, please contact: Traveline Cymru on 0800 464 0000 or National Rail Enquiries on 03457 48 49 50.