Strata Florida Bomb Hole

Walk up into the Cambrian Mountains above Llanwrtyd Wells and you'll find a crater in the moorland that looks like nothing on earth - Strata Florida Bomb Hole is genuinely odd. During World War II, the RAF used this remote valley for bombing practice, and one practice bomb went badly wrong in 1940, creating this massive hole in the ground. It's still there, surrounded by rough grass and mountain silence.

The walk to reach it takes you through proper wild Wales - the kind of landscape that makes you understand why so few people live out here. The crater itself sits in an amphitheatre of hills, and on a clear day you can see for miles. It's free to visit and there's no formal entrance, which is half the charm. You'll need a decent map or a GPS, because signposting is minimal. Allow a couple of hours from Llanwrtyd Wells if you're walking up from the village.

This appeals most to walkers who like their history with a side order of mystery, and families after something genuinely different from the usual castle visits. History buffs will find it fascinating - it's a tangible link to wartime Britain. Kids might get the gist, though younger ones may tire before the real scrambling begins.

If you're based at Welsh Glamping nearby, it makes an excellent half-day excursion. The weather up there can turn fast, so go armed with proper waterproofs and a compass. It's not a gentle stroll, but it's worth the effort.