Two large stones are all that remain of this large circle that must originally have sported 8 stones in a ring of 40 feet in diameter. These are among the tallest standing stones in Wales, with one at 13 feet in height and the other measuring about 10 feet.
There are marks near the top of the tallest stone which are said to be aligned to astronomical features, but this is not proven, and indeed, seems rather unlikely.
The standing stones are within easy walking distance of other prehistoric sites such as Castell Bryn Gwyn, Caer Leb, and Bodowyr Burial Chamber.
About Bryn Gwyn Standing Stones
Address: Pont Mynach,
Dwyran,
Anglesey,
Gwynedd,
Wales
Attraction Type: Prehistoric Site
Location: Off the A4080
Location map
OS: SH462669
Photo Credit: Ray West, licensed for reuse under the Creative Commons Licence
Opening Details: Open access site, usually accessible at any reasonable time
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HERITAGE
We've 'tagged' this attraction information to help you find related historic attractions and learn more about major time periods mentioned.
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burial chamber (Historical Reference) - Prehistoric (Time Period) -
NEARBY HISTORIC ATTRACTIONS
Heritage Rated from 1- 5 (low to exceptional) on historic interest
Castell Bryn Gwyn - 0.2 miles (Prehistoric Site) 
Bodowyr Burial Chamber - 0.7 miles (Prehistoric Site)
Caer Leb - 0.8 miles (Prehistoric Site)
Llys Rhosyr - 2.4 miles (Historic Building) 
Caernarfon Town Walls - 2.7 miles (Historic Building)
Caernarfon Castle - 2.8 miles (Castle) 
Crug Farm Walled Garden - 3.1 miles (Garden) 
Segontium Roman Fort - 3.5 miles (Roman Site)
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