Margam Abbey

The ruins of Margam Abbey stand in a field near Porthcawl like a stubborn reminder that monks once made serious architectural statements in South Wales. What you're actually looking at is a 12th-century Cistercian foundation, though only fragments remain - stone walls, arches, and enough masonry to piece together what was once a vast monastic complex.

Walking through the site itself is straightforward. The abbey church footprint is clear, and you can trace where the cloisters stood. The chapter house still has a decent roof, which is more than most ruins can claim. Allow 45 minutes to an hour unless you're genuinely interested in medieval monastic layout, in which case you'll want longer.

This one appeals more to history enthusiasts than casual visitors. Children might find it dull if you're not talking them through who lived here and why - it's not a fortress or a castle with obvious drama. But if you're staying at Trecco Bay Holiday Park and want a proper cultural break from the beach, it's only a short drive inland, making it a sensible half-day option.

The setting helps. The abbey sits in countryside with decent views across the Vale of Glamorgan, so the walk around the ruins doesn't feel like you're trudging through barren ground. Admission appears free, though best to check locally when you arrive. Go early in the day if you want solitude - weekends draw coach trips.