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Secret site

The Churchill Barriers

Holm to South Ronaldsay, Orkney

Causeways built to seal Scapa Flow after the Royal Oak disaster.

In October 1939 a German U-boat slipped into Scapa Flow and sank HMS Royal Oak. Churchill ordered the eastern entrances to be blocked with causeways of rock and concrete blocks.

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Open The Churchill Barriers on the mapReport a sighting here
When
1940–1945
Where
58.8800, -2.9000
Group
Secret bunkers & war sites

Visiting

Drive the A961. Blockships can be seen from the roadside.

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