Sharbutts 2 Rift

The caves around Portland aren't exactly secret - locals have known about them for decades - but Sharbutts 2 Rift remains refreshingly undercrowded. It's a proper limestone cave system that rewards a bit of scrambling and doesn't require specialist gear, which makes it accessible without being trivial.

You're looking at tight passages, some ducking required, and genuinely interesting geological formations. The rift itself opens up into larger chambers where the scale suddenly shifts. It's the kind of place where your eyes adjust and you start noticing details - flowstone, calcite deposits, the occasional bat if you're there at the right time. Budget 45 minutes to an hour depending on how methodical you are and whether you want to photograph anything.

This suits walkers with a bit of adventure in them more than casual strollers. Kids aged ten and up who don't mind getting muddy will have a crack at it; younger ones might find the confined spaces unsettling. You'll need a decent torch - the cave is genuinely dark - and sensible footwear because the floor is uneven and often damp.

Weymouth is three miles away, making this a straightforward morning expedition from any of the nearby holiday parks. Chesil Beach Lodge Park sits closest if you want minimal travel time. Combine it with a walk along the beach itself or a visit to Portland's higher ground for views across the Channel. The whole outing - cave plus surrounding walks - makes for a proper half-day activity that doesn't require advance booking or spending much money.