The medieval castle at Conwy is imposing and impressive--as it was meant to be. But its key virtue was location.
All of the surviving castles that King Edward I had built in the late-13th century are impressive. But Caernarfon Castle was designed to be something special.
Harlech Castle has stood for 700 years so far. And there's every chance it'll stand guard of this corner of the Welsh coast for at least another 700.