Other fortifications associated with Vortigern are at Arfon in Gwynedd, Bradford-on-Avon in Wiltshire, Carn Fadrun in Gwynedd, Clwyd in Powys, Llandysul in Dyfed, Old Carlisle in Cumberland, Old Sarum in Wiltshire, Rhaeadr Gwy in Powys, Snowdon, and Stonehenge in Wiltshire.