at latitude 51.67 , longitude -3.16 . Contents 1 About 2 Settlements 3 Routes 3.1 Major roads 3.2 Railways 3.3 Waterways 4 External Links About Caerphilly is a Principal Area in southern Wales, it shares its name with the town of Caerphilly . Settlements Caerphilly Bedwas Bargoed Blackwood Nelson New Tredegar