Culblean 1
Image by thelonious

Here's one!

http://www.themodernantiquarian.com/post/6695/bosckawenun.html

G x

Cheers! Never seen that before - would be unusual size for a Penwith circle, but if it's not modern I guess it could be hut circle remains. How odd.

Where's Craig Weatherhill when you need him?