The town of Caernarfon, to the south-west of Bangor, is the site of one of the most impressive castles in North Wales. Most of the castle, built during the reign of King Edward I, survives to this day and is accessible to visitors. The network of staircases and dark corridors that comprises the castle houses an interesting exhibition about the Royal Welch Fusiliers. The exhibition contains medals and decorations from throughout military history, as well as much equipment and weaponry from the world wars, the American civil war, and other battles and conflicts that the RWF have participated in.

Outside the castle, Caernarfon is the location of a harbour and a reasonably sized shopping district. Car parking is fairly plentiful, and the town is easily accessible from the Welsh coast road.

English name Carnarvon.