Playing with shadows.
Coity Castle is located in Coity near Bridgend in South Wales. Coity (Coety in Welsh) sounds just like the plural form of the Latin word coitus, but it seems to actually mean something related to woodland. Perhaps that's where they like it. (Yes, I make this joke every time. Get used to it.)
The weather was perfect. Freezing cold, crisp, and with the sun barely above the horizon, creating beautiful shadows over the stone.