Named, with typical enthusiast ingenuity and lateral thinking, The Sundial.
You, mate, have an annual arts festival in your fields! Free to view, every year something new...
The site from your pic told me how to design the crop circle.
http://www.cropcircleconnector.com/2007/oliverscastle/oliverscastle2007reconstruction.html
I see a connection between these works and the works of the guy who walks across dewey fields and photographs the results. He built mats out of leaves and photographed them as they flowed downstream. I'm not sure if he's the same guy who built a wall through a wood, using local stones and bending round trees and dipping down to a lake and reappearing at the other end.
Very enjoyable! Did you see Migeru's pic? Wot I wrote in one enjoyable image--in a field near you! (No doubt.) Don't fight forces, use them R. Buckminster Fuller.