Caer Williamsburg

Scrambling up the grassy mound near Caernarfon, you'll find the atmospheric remains of what locals call Caer Williamsburg - though don't expect anything grand. This is castle ruins in their rawest form: tumbled stone walls, overgrown earthworks, and the kind of place where imagination does most of the work.

History buffs will appreciate the medieval fragments scattered across the site, but honestly, it's more about the setting than spectacular stonework. The views across the Menai Strait are lovely on a clear day, and it makes for a pleasant hour's exploration if you're already in the area.

Families staying at nearby parks like Glan Gwna or Bryn Gloch might find it a decent leg-stretcher, though younger children could lose interest quickly - there's not much to climb or explore safely. Proper walking boots help on the uneven ground.

Timing your visit is tricky since opening details aren't widely publicised. Best to treat it as an outdoor site you can visit anytime, though early morning or late afternoon light shows off the remains to best advantage. It's hardly worth a special journey, but as part of a broader exploration of Caernarfon's attractions - including the magnificent castle in town - it adds another layer to the area's medieval story.