Beaumaris Castle
Isle of Anglesey, Wales
World Heritage Site; unfinished concentric castle with moat
Caerphilly Castle
Caerphilly, Wales
Britain's second-largest castle; famous leaning tower and water defences
Harlech Castle
Gwynedd, Wales
World Heritage Site; clifftop Edwardian castle with floating bridge entrance
Kidwelly Castle
Carmarthenshire, Wales
Well-preserved Norman concentric castle; Monty Python filming location