Cardiff castler r cardiff castle is one of walesandrsquo most popular tourist attractions located in the heart of the city and surrounded by the idyllic bute park youandrsquoll discover a fascinating 2000 year history concealed within its fairytale towersr r of all the castles in the uk cardiff castle is one of the most extraordinary and also one of the most complex having served as a roman fort a norman stronghold a second world war hideout and an extravagant gothic palace for one of t