I do really like the look of Gladman's Cairn - to give it its now official title :-) on South Black Hill. The connection with the cairn on Carnethy Hill just felt strong when walking the hills between them. It's a mystery that I'd love to know the answer to.

Here's a view over the top of it. It's massive. Got to thank you again Gladman for posting the images of it a few years back. We've been lucky to have a few good days out there because of it.

https://500px.com/photo/224293201/gladman-s-cairn-on-south-black-hill-by-spaceways

I still like the look of this cairn near summit of Ward Hill on Hoy too.

https://500px.com/photo/38288702/ward-hill-hoy-by-spaceways

and what's this one???

http://www.themodernantiquarian.com/post/151656/cnoc_breac.html

Upland cairns are so tricky.