Ogof Deuben

Scrambling through limestone cliffs above Llandudno, you'll find this natural cave that's remained largely off the tourist radar. Ogof Deuben cuts deep into the rock face of the Great Orme, offering a proper spelunking experience for those willing to get their hands dirty. The entrance can be tricky to spot unless you know where you're looking - it's not signposted like the more famous show caves further south.

Adventurous families with older children will get the most from this one, though it's definitely not suitable for toddlers or anyone with mobility issues. The cave system extends back into the hillside, with some tight squeezes and uneven surfaces that require a decent head torch and sturdy footwear. Local cavers sometimes use it for training, which tells you something about the level of challenge involved.

Timing your visit matters here - wet weather can make the approach slippery and the cave itself rather damp. Summer months offer the best conditions, though you'll still want waterproofs. Allow at least an hour for a proper explore, longer if you're taking it steady with the family. It makes a cracking addition to a Great Orme walking day, especially if you're staying at one of the nearby parks like Hafan y Gogarth or Aberconwy Resort. Just don't expect facilities - this is wild caving at its most authentic.