Great Welsh castles Wales is one of the world's greatest countries for castles - prepare to be dazzled. Conwy Castle princesses Marianne and family visit the majestic Conwy Castle for a fairytale adventure. South Wales history The Big Bang, castles built on shifting sands, the rise of industry and the call of the collieries. Castles of King Edward I Discover the 13th century castles and town walls built by King Edward I in North Wales. Castles everywhere With over 600 castles, wherever you go on holiday in Wales, you won't be too far from a castle. Caernarfon Castle was the most expensive castle ever built by a king of England. It’s not just a great military building, it’s also a great piece of art. Visiting Caernarfon Discover a mighty medieval fortress and the North Wales town which bears its name.