Castles · North Wales
Castell Bryn Gwyn
In or near Newborough.
Castell Bryn Gwyn — Welsh prehistoric site.

Wikimedia Commons contributors — see linked file page for photographer and licence licence
Plan your visit
- Typical visit
- 1.5 h–3 h
- Nearest railway station
- Caernarfon · 4.9 km
- Free entry
- Family-friendly
- Limited wheelchair access
Getting there & planning your visit
To visit Castell Bryn Gwyn, the nearest railway station is Caernarfon, located 4.9 km away. Admission is paid, and wheelchair accessibility is limited. The postcode for sat-nav is LL61 6NZ.
About
Castell Bryn Gwyn is a castle in the United Kingdom — fortified architecture from the medieval, Tudor, or Victorian-revival period. Heritage designation: scheduled monument. Owned by Cadw. Managed by Cadw. Wikidata describes it as: "Welsh prehistoric site". Coordinates: 53.1784°, -4.2979°.
Photo gallery
Summary from the official site
Castell Bryn Gwyn is a prehistoric site that features the remnants of a Neolithic settlement, primarily a single bank. Excavations have uncovered evidence of habitation from the Neolithic era through to Roman times, highlighting its long historical significance.
Read more on the official property page.
From the Wikipedia article
Castell Bryn Gwyn, officially spelled Castell Bryngwyn, is a prehistoric site on the Isle of Anglesey, west of Brynsiencyn. It is a circular clay and gravel bank covered with grass, still some 1.5 metres (4.9 ft) high and revetted externally by stone walls, which surround a level area some 54 metres (177 ft) in diameter. Its name means "White Hill Castle". Since 2024, Cadw, who maintain the site, use the spelling "Bryngwyn".
Excerpt from Wikipedia under CC BY-SA 4.0. See the source article linked in Sources below.
Background
Visiting
Car parking is minimal but the site is accessible from the A4080 by a footpath. Another path follows the low ridge, southwest over stiles to the Bryn Gwyn stones, or northeast, past the site of the former stone circle of Tre'r Dryw Bach, some 1/2 mi to Caer Lêb where it meets a minor road with limited car parking space.
Sourced from Wikipedia under CC BY-SA 4.0.
- Coordinates
- 53.1784, -4.2979
- District
- Isle of Anglesey
- Parish
- Rhosyr
- Postcode
- LL61 6NZ
- Parliamentary constituency
- Ynys Môn
- Nearest railway station
- Caernarfon — 4.9 km
- Opening
- 1st April - 31st March 10am-4pm; closed 24, 25, 26 December and 1 January
- Official site
- cadw.gov.wales
Sources
- wikidata: Q5049667 (CC0)
- wikipedia: Castell Bryn Gwyn (CC BY-SA 4.0)
- commons: View across Castell Bryn Gwyn 11102009.JPG (CC BY-SA 4.0)
Other places nearby

Castell Bryngwyn
Archaeological sites · 0.0 km

Bryn Gwyn stones
Hill forts · 0.3 km

Bryn Gwyn Standing Stones
Stone circles · 0.3 km

Fron Caravan & Camping Park
Campsites · 0.6 km

Caer Lêb
Hill forts · 0.8 km

Caer Lêb Romano-British Farm
Archaeological sites · 0.8 km

Tyddyn Albert Caravan Site
Caravan parks · 1.0 km

Tre Ifan hut circles
Archaeological sites · 1.0 km

Bodowyr Burial Chamber
Hill forts · 1.1 km

Bodowyr Chambered Tomb
Archaeological sites · 1.2 km

Trefwri 2 Menhir Standing Stone
Stone circles · 1.2 km

Pont Melin Bodowyr
Historic bridges · 1.2 km
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Frequently asked questions
- Where is Castell Bryn Gwyn?
- Castell Bryn Gwyn is in North Wales, United Kingdom (postcode LL61 6NZ), in the parish of Rhosyr.
- What is Castell Bryn Gwyn?
- Castell Bryn Gwyn — Welsh prehistoric site.
- How do I get to Castell Bryn Gwyn?
- The nearest railway station is Caernarfon, about 4.9 km away. Drivers can use postcode LL61 6NZ.
- Who runs Castell Bryn Gwyn?
- Castell Bryn Gwyn is operated by Cadw.
- Is Castell Bryn Gwyn a listed building?
- Castell Bryn Gwyn is officially recognised as scheduled monument listed.
- Does Castell Bryn Gwyn charge admission?
- Castell Bryn Gwyn typically charges admission. Check the official site for current ticket prices and opening hours.
- How do I get to Castell Bryn Gwyn?
- The nearest railway station is Caernarfon, about 4.9 km away. Drivers can navigate to postcode LL61 6NZ.