Nuns' Cave

The cave sits tucked into a cliff face on the Isle of Mull's northern shore, accessible via a coastal path that demands proper footwear and a head for heights. Inside, you'll find a modest chamber - nothing vast or cathedral-like - where legend has it medieval nuns sheltered during raids. The real draw is the journey: scrambling down past seabirds, the Sound of Mull spread below you, then ducking into that cool darkness feels properly adventurous.

Historically minded visitors will get the most from this one. There's not much interpretation on site, so you'll want to have read up beforehand about the island's religious communities. The cave itself won't hold your attention for long - fifteen minutes inside and you've seen it all. But the walk there and back, maybe an hour total if you're not rushing, makes it part of something bigger: a proper coastal exploration.

It's free, naturally. Best visited when the tide's right and the weather's behaving - you don't want to be scrambling on loose rock in the rain. Summer months are kindest, though Mull's exposed and can turn on you quickly. Port nan Gael Campsite sits just a few miles away if you're basing yourself nearby, and honestly, pairing this with a walk along the Sound makes for a solid half-day. Not a must-do on its own merits, but worth the detour if you're already island-hopping.