Wales saw a period of 600 years of fortified palace and castle building by Welsh princes, Norman rulers and English kings. Some of these are now UNESCO sites: Caernarfon, Beaumaris, Conwy, Rhuddlan and Harlech. In South Wales, there’s a string of castles, from Gwent to Pembroke with the jewel in the crown in Cardiff. In the borderlands of east Wales, there are palatial castles built in the romantic chivalric era.
Whatever the era there are tales and legends and stories of princes and princesses, dragons and heroes. And all of them are true.
We would need to know the number in your group, their ages if under 16 and if anyone has mobility issues.