The other side of Skaill Church from the Castle of Snusgar. ‘The Castle’ was an old structure now gone to leave behind a detail-less spread of stones in an extensive mound. A silage pit dug through one end uncovered no evidence of walls amongst the stones but did find ashes and old bones.
On analogy with why the brochs of Burray were locally differentiated as “Hillock” and “Castle” it appears that the latter name is used for sites with subterranean chambers (“dungeons”).