Here you will find the best 4 castles in rank order, that you should visit North Wales. A short stay in North Wales can be a castle hunter’s dream. Short car rides from a central location such as Bangor can present you with four of the best preserved medieval castles in the country.North Wales is a very special area for anyone with an interest in medieval history, and the four we’ve mentioned here were described by UNESCO as “the finest examples of late 13th and early 14th century military architecture in Europe.These castles remain in remarkable condition and they give you the opportunity to see the work of one of the greatest castle builders in history: Master James of St George. The castles here are unlike any you will see anywhere else and the Iron Ring of Castles in North Wales are the lasting legacy of Edward I - one of the greatest castle building kings in history.