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Castell Bryn Gwyn

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Llanfairpwllgwyngyll, LL61 6NZ Visit Site
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Castell Bryn Gwyn

Castell Bryn Gwyn (Castle White Hill) is a circular clay and gravel earthwork covered by grass. Still around a metre and a half high, with stone walls surrounding a level area of about 54 metres in diameter.

The original use of this site remains unknown, though it may have been a religious sanctuary – and Neolithic pottery found in the area indicates its use in this period, meaning it may have been a henge monument at one time. The earliest bank and ditch belong to the end of the Neolithic period (2500-2000 BC), though the present wall was built during the iron age and it was later refortified during the 1st Century CE.

Bryn Celli Ddu, Anglesey, one of the finest prehistoric passage tombs in Europe

Where is it?

Castell Bryn Gwyn is located among open fields – but actually feels far more remote than it is. In actual fact, the site is only around a ten minute drive from the village of Llanfairpwllgwyngyll and, therefore, only a short journey from either of the two bridges. To reach Castell Bryn Gwyn, you can follow the A5, then the A4080 (Ffordd Brynsiencyn) for just over 6 miles, where you’ll come across a layby – this is the nearest parking for the site and you’ll need to walk the rest of the way. There is a working farm that uses these tracks for access, however, so be careful not to block it. If you follow the footpath that runs between the two hedgerows, you’ll reach the site in about five minutes.

It is worth bearing in mind that Castell Bryn Gwyn is a single site of historic interest, so it’s better to visit as part of a day of other activities – there are several prehistoric sites nearby, for example, such as Bryn Celli Ddu Burial Chamber, so it’s possible to visit a number of similar sites in a single day.

Bryn Celli Ddu, Anglesey, one of the finest prehistoric passage tombs in Europe

Opening times

Accessible year round
The site is open daily between the hours of 10:00am and 4:00pm, with last admission 30 minutes before closing.

The site is closed between the 24th and 26th of December and on the 1st of January.

Small waterfalls, The Dingle Nature Reserve Llangefni. Long expo


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