Ashhole Cavern

You'll find this cave tucked away near Brixham on Devon's coastline, and it's one of those spots that rewards a bit of detective work to visit. The entrance is modest - nothing grand or overdeveloped - which means you get the genuine article rather than a sanitised tourist attraction. Inside, it's genuinely atmospheric. Water trickles through the rock, the air is cool and damp, and there's real geology on display without the gift shop overshadowing it.

It works best for anyone who enjoys a spot of light caving and doesn't mind a bit of scrambling around. Families with younger kids might find it underwhelming if they're expecting a massive cavern system - it's intimate rather than vast. Older children and proper geology enthusiasts will get more from it. The whole thing takes perhaps thirty minutes unless you're the type to linger and photograph everything.

Brixham itself is a working fishing town with actual character, so you're not staying in some theme-park version of the seaside. If you're based at one of the nearby parks - South Bay is barely over a mile away, Hoburne Devon Bay a short drive further - this makes a decent rainy-day sortie or a quick addition to a coastal walk. It's free and accessible, though you'll want to check opening details before heading over. Worth the detour if you're in the area, but not the reason to pick this part of Devon on its own.