Mewslade Cave

Getting to this sea cave on the Gower Peninsula involves a proper scramble down clifftops near Fall Bay. The cave itself sits tucked into limestone cliffs that have been battered by centuries of Atlantic swells, creating a dramatic archway you can walk through at low tide. Don't expect handrails or guided tours - this is wild Wales at its most unforgiving.

Families with younger children should think twice. The path down is steep and can be treacherous when wet, which in Wales is most of the time. Confident walkers and teenagers looking for a bit of adventure will love it, especially if they time it right with the tides. Check tide times before you set off - the cave becomes inaccessible at high water.

You'll need sturdy footwear and about two hours for the round trip from the nearest parking. The cave itself takes ten minutes to explore, but the coastal walk back up rewards you with cracking views across to Devon on clear days. It's free to visit, naturally, though getting there requires effort most people aren't prepared for.

If you're staying at one of the nearby parks like Gower Holiday Village or Bank Farm Leisure, this makes a decent day trip for the more adventurous members of the family. Just don't expect everyone to manage the descent.