Hillfort of Caer Daun for Mythic Britain story of Mythras RPG : Waterlands - http://thedesignmechanism.com/store.php#!/Mythic-Britain-Waterlands-Adventures-in-the-Great-Mire/p/114392635/category=24197109
http://jeuxetfeerie.org/PDF/Caer_Daun_full.jpg
Caer Daun