St Mary's Church, Brecon

The cathedral dominates Brecon's High Street, a proper show-stopper of sandstone and history that you can't miss even if you tried. St Mary's is one of Wales's finest parish churches, though it was elevated to cathedral status in 1923, and stepping through the doors feels like walking into several centuries at once.

Inside, the space is generous and light - big windows flood the nave with brightness, which makes a change from the gloomier medieval churches you find elsewhere. The timber roof is impressive if you bother to look up, and there's enough carved stonework and memorials to keep history buffs occupied for a good half hour. The choir stalls are worth a proper look.

It's free to wander in during daylight hours, though opening times aren't always consistent so don't rely on visiting at dusk. Allow thirty to forty minutes if you're genuinely interested in the architecture and monuments. If you're just passing through Brecon on a park holiday, it's absolutely worth a ten-minute stop.

The town itself sits nicely between several camping spots. Cefn Cantref Campsite is barely a mile away, making this an easy walk from your pitch, while Pencelli Castle and Woodland Park Glamping are both within four miles if you fancy slightly more space. Brecon Beacons National Park dominates the landscape around here, so you'll likely be exploring that too - this church is a decent town-centre counterpoint to a day of hills and walking.