the mediaeval chapel of St Blane.
The chapel itself is remarkable, hidden away among huge trees in a fertile cup of land, sheltered from the sea and prying eyes - though Vikings apparently destroyed the Celtic monastery which orginally stood on the site. We were fortunate to have the place to ourselves for a good half hour.
Apart from this unique purpose, the walk itself was glorious. Some of the path along the shore reminded me of the Arran shore north of Blackwaterfoot, while the last section, through fields (and cows!) was more like Herefordshire. And it was amazing to feel at once part of Ayrshire - looking at Cumbrae from a new standpoint - and the Highlands: the Highland Boundary fault has a profound effect.
So I've done it - and now I see why people go on holidays to Bute. I can go there in an hour and be home for tea. I'll be back ...