Caerphilly County Borough (Welsh: Bwrdeistref Sirol Caerffili) is a county borough in the south-east of Wales. It is governed by Caerphilly County Borough Council. Its main and largest town is Caerphilly. Other towns in the county borough are Bedwas, Risca, Ystrad Mynach, Newbridge, Blackwood, Bargoed, New Tredegar and Rhymney. Caerphilly County Borough is in southeast Wales and straddles the border between the historic counties of Glamorgan and Monmouthshire. It is bordered by Cardiff to the southwest, Newport to the southeast, Torfaen to the east, Blaenau Gwent to the northeast, Powys to the north, Merthyr Tydfil to the northwest and Rhondda Cynon Taf to the west. (Source: Wikipedia.org, CC BY-SA)