Bridge Cave

A short walk from Neath takes you to this modest limestone cave tucked into the valley side - it's the sort of spot locals know about and tourists often miss. The cave entrance sits beneath a natural stone arch (hence the name), and inside you'll find a reasonably sized chamber that stays cool year-round. Water trickles through the rocks, and there's enough space to explore without needing specialist gear - just bring a torch and sensible footwear.

It's worth visiting if you're already walking the valleys around Brecon Beacons Camping & Caravan Park or staying at Four Falls Glamping nearby. The cave itself won't take more than twenty minutes to see properly, but the walk to reach it is the real draw - the valley setting is lovely, especially on overcast days when the light filters through the trees just right. Kids will enjoy the sense of adventure, though it's not dramatic enough to hold their attention for hours.

Go when it's dry. After heavy rain the approach path gets muddy and slippery, which defeats the purpose of a quick cave visit. Spring and autumn are ideal - the weather's more predictable and you won't be sweating through layers. There's no visitor centre or facilities here, so bring water and check your phone signal before heading down. The cave is free to visit, and you can turn it into a proper half-day out by combining it with other walks in the area.