Caerphilly Castle (Welsh: Castell Caerffili) is a medieval castle that dominates the centre of the town of Caerphilly in south Wales. It is the largest castle in Wales and the second largest in Britain after Windsor Castle. Built mainly between 1268 and 1271 to stop Llywelyn ap Gruffudd’s southward ambitions, it is an early example of a concentric castle with extensive water defences. –
The picture is taken in the spring of 2009.