Upper Blackhole Cave

Scrambling down into this limestone cave system on the Gower Peninsula feels properly adventurous - though you'll need a head torch and sturdy boots to make the most of it. The entrance drops down through a series of rocky chambers, with some tight squeezes that'll test your nerve if you're claustrophobic.

Caving enthusiasts will love the challenge, but families with young children should think twice. The terrain is unforgiving and there are no handrails or safety barriers to speak of. You'll want at least two hours if you're planning to explore the deeper sections properly.

What makes this cave special is its raw, untouched feel - no gift shop or guided tours here, just you and the rock formations. The calcite deposits catch your torch beam beautifully, creating an almost otherworldly atmosphere underground. Fair warning though: it's not signposted particularly well, so GPS is essential.

For those staying at nearby sites like Gower Holiday Village or Bank Farm Leisure, it's an easy drive from your caravan base. Just don't expect creature comforts - this is wild Gower at its most uncompromising. Pack waterproofs too, as the cave can be damp year-round. Experienced potholers rate it highly, but casual visitors might find the nearby beaches more their cup of tea.