How well do you know your brochs?
Can you name this one?

Clue: beside an Orkney bay

How well do you know your brochs ?
How well do you know your brochs?

Clue: beside an Orkney bay
Clue – a carved stone ball was found at this broch. The carved stone ball has 67 ‘knobs’. 67 is a Prime Number. Think on.
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