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Caer Gybi Roman Fort

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 & prices

Opening times

1st April - 31st March Open all year

Open all year — during reasonable daylight hours

Visitor information

Dogs welcome icon

Dogs welcome

Pay and Display car park icon

Pay and Display car park

Walking difficulty icon

Walking difficulty

Terrain: Level 1 – Accessible

Drone policy icon

Drone policy

No smoking icon

No smoking

Health & Safety icon

Health & Safety

Care and attention must be paid when visiting this monument. It will be regularly exposed to the natural elements and may be slippery or muddy underfoot.

Appropriate footwear for the season and type of monument must be considered prior to your visit. Please only attend during the set opening hours, these have been chosen for your safety i.e. appropriate level of lighting.

Many of our monuments are located at areas of height, attention must also be paid therefore to the surrounding areas, ditches and moats when visiting.

Guardrails have been installed to prevent access to any areas of the site that we have deemed as dangerous or to prevent falls in specific areas. Please do not climb over or through any fixed installation.

Any handrail provided should be used to help you safely navigate historic steps, as these may be uneven and may be of different height.

As with all ancient monuments there is always a risk of stones being dislodged in bad weather, however, we manage this through extensive monitoring. 

Climbing may result in serious injury

There are several wild plants and flowers, although these are great pollinators, they may be poisonous to visitors and animals, we strongly advise you not to touch or allow dogs to eat any vegetation.

Please watch our health & safety film before visiting Cadw sites.

Iechyd a Diogelwch / Health and Safety

Please report any anti-social behaviour such as climbing, setting fires, graffiti etc. to CadwAccidentsReports@gov.wales

The following signs can be found around the site at key areas of risk, please pay attention where appropriate.

Slippery or uneven surfaces icon

Slippery or uneven surfaces

Directions

Google Map
Road: In Holyhead, overlooking the harbour, off A5
Rail: Holyhead
Bike: NCN Route No.8 (700m/765yds).

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

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