Travelers are voting Cardiff Castle, Caerphilly Castle and Morlais Castle as the best of 3 castles in Cardiff. There are 3 castles in Swansea a city just 34 km from Cardiff and 3 castles in Aberporth which is 73 km distant. The most popular of these are Carew Castle in Swansea and Cresswell Castle in Aberporth. You can find 84 Castle in the country of United Kingdom and Tower of London is our members favorite Castle in all of United Kingdom. Want more? Check out our map of castles in Cardiff.