River Usk River Usk The River Usk (; ) rises on the northern slopes of the Black Mountain ("y Mynydd Du"), Wales, in the westernmost part of the Brecon Beacons National Park. Initially forming the boundary between Carmarthenshire and Powys, it flows north into Usk Reservoir, then east by Sennybridge to Brecon before turning southeast to flow by Talybont-on-Usk, Crickhowell and Abergavenny after which it takes a more southerly course. Beyond the eponymous town of Usk it passes the Roman legionary fortress of Caerleon to flow through the heart of the city of Newport and into the Severn estuary at Uskmouth beyond
Castleton, Newport Castleton, Newport Castleton () is a hamlet in the city of Newport, South Wales. Castleton is in the Marshfield ward on the A48 dual carriageway located between the city of Newport to the east and Cardiff to the west. Castleton has a Baptist chapel. It was at the Castleton Baptist Association meeting in 1816 that it was resolved to build the first Welsh Baptist Chapel in Newport, and the land then acquired in Charles Street, with the help of a bequest from John Williams, a Newport tailor. This building is now used as a business and Church meetings are held