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. 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. Cardiff Castle From the gargoyles on the castle walls to secret tunnels, Cardiff Castle is brought vividly to life. Visiting Caernarfon Discover a mighty medieval fortress and the North Wales town which bears its name.