Latitude: 53.0733 / 53°4'23"N
Longitude: -4.2918 / 4°17'30"W
OS Eastings: 246558
OS Northings: 355349
OS Grid: SH465553
Mapcode National: GBR 5H.BFWJ
Mapcode Global: WH43T.10KS
Plus Code: 9C5Q3PF5+87
Map layers use either open data or maps from the Ordnance Survey and Maptiler APIs.
Historic map layers are currently experimental and may not necessarily be available all the time.
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NLS (Historic)
Entry Name: Former reservoir on hill to north-east of Fort Williamsburg
Listing Date: 8 September 1998
Last Amended: 30 September 1999
Grade: II
Source: Cadw
Source ID: 20473
Building Class: Gardens, Parks and Urban Spaces
ID on this website: 300020473
Location: Situated approximately on the flat hilltop approximately 540m to north-east of Fort Williamsburg and to due east of the house.
County: Gwynedd
Community: Llandwrog
Community: Llandwrog
Locality: Glynllifon
Traditional County: Caernarfonshire