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 Newbridge Rhymney Risca Ystrad Mynach Routes Major roads A470 Railways Waterways External Links Caerphilly County Borough