Foel Fenlli

An Iron Age multivallate hillfort atop a 511m peak in the Clwydian Range, Denbighshire, North Wales, built approximately 2,500 years ago. The fort features extensive ramparts on the north and east with slight defences to the south where natural slopes are extremely steep, enclosing 9.5 hectares with one original inturned entrance at the west. A 2006 survey identified 61 possible hut platforms and a central spring for water supply. Named after the tyrannical king Benlli who reportedly lived there c. 450 AD, the site was first noted by antiquarian William Camden in 1607.