<P> This is a list of castles in Wales, sometimes called the "castle capital of the world" in view of their high density . Wales had about 600 castles, of which over 100 are still standing, either as ruins or as restored buildings . The rest have returned to nature, and today consist of ditches, mounds, and earthworks, often in commanding positions . Many of the sites in Wales are cared for by Cadw, the Welsh government's historic environment service . </P> <P> The four castles of Beaumaris, Caernarfon, Conwy, and Harlech together make up the Castles and Town Walls of King Edward in Gwynedd World Heritage Site, considered to be the "finest examples of late 13th century and early 14th century military architecture in Europe". </P> <P> Castles of which only earthworks, fragments, or nothing remains include: </P> <Ul> <Li> Llangewydd Castle </Li> <Li> Oldcastle Bridgend </Li> <Li> Stormy Castle </Li> </Ul>

How many castles are there in north wales