Diocese of Swansea & Brecon

The Cathedral of St John the Evangelist in Brecon is the spiritual heart of a diocese that stretches across a huge chunk of mid-Wales, covering everything from the Beacons to the borders. It's a proper working church, not a museum piece - you'll find choristers and clergy going about their business, which gives it real atmosphere rather than the sterile feeling of some tourist attractions.

The building itself dates back to the 15th century, though it's been worked on countless times since. There's decent medieval stonework if you know what to look for, and the interior has that peaceful, slightly cool quality you get in old churches. It's worth an hour of your time if you're interested in religious architecture or Welsh history - less so if you're after something more hands-on.

It's free to visit, though donations help keep the roof on. Opening hours can be a bit unpredictable since it's an active place of worship, so ring ahead or check their notice board. The cathedral sits right in Brecon town centre, making it straightforward to combine with a browse around the high street or a walk along the canal.

For a base, Cefn Cantref Campsite is barely over a mile away - close enough for an evening stroll into town. Pencelli Castle and Woodland Park Glamping are also within easy reach if you're after something with more space. The Beacons National Park surrounds everything, so this works as a cultural breather between bigger walks.