Caernarfon

Caernarfon, historically Anglicised as Carnarvon, is the county town and namesake of Caernarfonshire. It lies at the mouth of the River Seiont into the Menai Strait, across which lies the Isle of Anglesey, which is clearly visible from the waterfront in the town; it acquired its current name in the 13th century, derived from Welsh caer yn Arfon ("fort opposite Anglesey"). With its origins in c. 77 AD as the Roman fort of Segontium, it is renown for its impressive stone-built castle built in the 13th century by Edward I of England.

Caernarfon has been known in recent years as a stronghold for the Welsh language; at the 2021 Census in the UK, the Caernarfon catchment area had the highest percentage of Welsh speakers, with 85.3% om the area able to speak the language.