In a rectangular compound on a low hilltop at the end of a line of telegraph poles, 100 yards North of the B6270 and 20 yards South of the River Swale.
LOCKED All surface features remain intact with the blue paint flaking badly. The hatch is locked.
Opened in 1965 and closed in 1991.
Exploring Grinton’s enigmatic mounds
It is also known that the Second World War and the Cold War had a significant impact on the western mound. Initially the site of an anti-aircraft gun emplacement and then a Royal Observer Corps nuclear bunker, there is a very high chance that earlier archaeology has been displaced or buried under the soil excavated from the bunker and tipped along the mound’s northern slope.
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