Castell Crugerydd

The earthwork fortress rises from the landscape near Presteigne with the kind of quiet authority that makes you forget you're looking at something nearly a thousand years old. Castell Crugerydd sits on a hilltop, its defensive banks and ditches still clearly defined despite centuries of neglect - you can walk the perimeter and see exactly why Norman builders chose this spot.

It's a proper history walk rather than a showpiece attraction. There's no visitor centre, no cafe, no entrance fee. Just you, the ramparts, and views across the Powys countryside. Bring an OS map and sensible boots because the approach involves a bit of a trudge, but that's partly why it feels so untouched. History enthusiasts will find it rewarding; kids aged eight and up tend to enjoy the scramble and the chance to play in the ditches, though younger ones might find the walk tedious.

Allow an hour to explore properly, longer if you're the type who sits about taking photographs. Spring and autumn are best - summer can be overgrown, winter muddy. The nearest town is Presteigne, where you can pick up supplies or grab lunch before heading out.

If you're staying at Presteigne Holiday Park or Fforest Fields nearby, this makes a solid half-day expedition combined with a walk into town. It's the sort of place that rewards curiosity but doesn't demand it - you won't feel shortchanged if you're just passing through Mid Wales.