Caernarfon
It was built in 1283 by Edward I as a military stronghold, but also served the purpose of a seat of government and royal palace for the king. The castle was designed to emulate the architectural design of Constantinople, the capital city of the Roman and Byzantine Empire. It was also said to represent the dream castle of Welsh myth and legend, ’the fairest that ever man saw'.
If you’re planning on visiting Caernarfon, make sure to take part in the walks along the walls to really get a sense of the history of the site. There are also some fantastic imaginative exhibitions located within the towers that can be discovered along these wall walks. The castle is also home to the Regimental Museum of the Royal Welch Fusiliers, Wales’s oldest regiment.