The ridge is surmounted by a number of chambered tombs, in varying degrees of preservation. There's a heavy covering of bracken over the mounds at this time of year, but the general shape and form can still be seen. We have a poke about on the top of 'A', the most westerly of the three primary tombs that remain. This reveals one in-situ capstone, as well as another slab that presumably formed part of the chamber's roof.
'B' is another large mound, but the chamber is badly ruined with only a couple of uprights to be seen. 'D' on the other hand is great, with a well-preserved kerb and a largely intact chamber covered by a very thick, square slab. This is a beautiful spot, with views across Crow Sound to St Martin's and south to Porth Hellick, also dotted with chambered tombs and our next destination.
On the eastern edge of St Mary's, walking south between Innisidgen and Porth Hellick Downs the path passes over Gap Point towards Deep Point where Moth and I spotted five further chambered cairns in varying stages of ruin, peeping out from the carpet of heathers, gorse and moss.