Speedwell Cavern

You descend into darkness and then board a small boat to glide across an underground lake - that's the main draw at Speedwell Cavern near Hope Valley. It's genuinely atmospheric, this flooded mine shaft that opens into a vast cavern with water so still it mirrors the rock above. The boat ride lasts about fifteen minutes and takes you deeper into the mountain than most visitors expect, which is precisely why people make the trip.

The cavern itself formed from lead and fluorspar mining rather than natural cave processes, which gives it a different character from some of Derbyshire's other underground attractions. You'll walk through original mine workings before reaching the water - it's all quite industrial and raw, which appeals to history types and anyone interested in Victorian mining. The whole experience takes roughly an hour from start to finish.

This works well alongside a wider Peak District park holiday. Castleton Caravan and Motorhome Club Campsite sits just 1.1 miles away, making it dead convenient, while Laneside and Derbyshire Hills offer slightly more space if you're pitched up for a few days. The Hope Valley location puts you within striking distance of other cavern attractions and proper walking routes if the weather turns decent.

It's not free - you'll need to budget for admission - but the boat journey justifies it. Kids generally enjoy the subterranean drama, though very young ones might find the boat ride a bit claustrophobic. Definitely book ahead if possible, and go on a quieter day if you can manage it. The crowds do detract from the experience.