Llyn Mawr South Standing Stone

You'll need to work for this one. The Llyn Mawr South Standing Stone sits on the moorland above Bwlch-y-ffridd in Powys, and it's the sort of place that rewards a proper walk rather than a quick car park visit. The stone itself - a Bronze Age marker, roughly 2,000 years old - stands alone on the open hillside, which is what makes it oddly moving. No visitor centre, no interpretation boards. Just you, the stone, and the Welsh hills falling away around you.

It's a decent trek if you're staying at any of the caravan parks nearby (Sunny View, Carmel, or Meadow Springs are all within a couple of miles), and honestly, that's the market here - walkers and archaeology types who don't mind a bit of leg work. You won't spend hours on site; the draw is the walk itself and the sense of standing where Bronze Age people marked their landscape. The moorland can be exposed and boggy, so go in decent boots and check the weather.

There's no admission charge - it's free to visit. Allow a couple of hours including the walk from the nearest car access point. Best visited on a clearer day when you can actually see where you are; coming up here in mist rather defeats the purpose. If you're based at one of the holiday parks in the area, it's a worthwhile half-day option, though it won't appeal to those after manicured attractions or quick photo stops.