Latitude: 53.0702 / 53°4'12"N
Longitude: -4.2989 / 4°17'56"W
OS Eastings: 246071
OS Northings: 355020
OS Grid: SH460550
Mapcode National: GBR 5H.BL5L
Mapcode Global: WH43S.Y315
Plus Code: 9C5Q3PC2+3C
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Historic map layers are currently experimental and may not necessarily be available all the time.
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NLS (Historic)
Entry Name: Outer Defensive Wall to Fort Williamsburg
Listing Date: 29 May 1968
Last Amended: 30 September 1999
Grade: II*
Source: Cadw
Source ID: 20467
Building Class: Defence
ID on this website: 300020467
Location: Forming a perimeter to the fort which is approximately 0.5km south-east of the house and reached by the south drive.
County: Gwynedd
Community: Llandwrog
Community: Llandwrog
Locality: Glynllifon
Traditional County: Caernarfonshire