Craig-y-Nos Country Park

You're standing in what was once a Victorian mansion's grounds, now a proper country park that sprawls across 40 acres of Powys woodland. Craig-y-Nos was the home of opera singer Adelina Patti in the 1800s - the park still contains the ruins of her castle, which feels genuinely atmospheric on a quiet afternoon. The main draw here is walking. There are woodland trails of varying difficulty, a lake you can loop around, and if you're feeling it, climbs that give you views across the Brecon Beacons. It's the kind of place where you'll stumble upon old stone structures half-hidden by trees and wonder about the stories they hold.

This works brilliantly for families who want to burn off some energy without it being too serious. Kids won't get bored if you make a game of exploring the ruins, though expect the walk to take two to three hours to do it properly. The trails aren't marked with military precision, so bring a map or check your phone signal before you head in. It's free to access, which makes it even better value.

If you're camping at Brecon Beacons Camping & Caravan Park just down the road, or staying at one of the nearby glamping spots like Aber or Four Falls, Craig-y-Nos works as an excellent half-day excursion. It's atmospheric without being crowded, and the woodland gives you proper shelter if the Welsh weather turns - which, let's be honest, it will.