Fan Bay Sound Mirrors

Concrete acoustic mirrors the size of small houses sit on the clifftop near Dover, pointing out to sea like giant ears listening for trouble. They're oddly compelling - built in the 1930s to detect enemy aircraft before radar took over, they're now just monuments to a very specific moment of British anxiety. You walk up to them, look at the curves, understand roughly how sound-focused engineering worked, and then you're done. Takes maybe 20 minutes if you're not particularly fascinated by military history.

The real draw is the location. Fan Bay itself is a decent stretch of cliff-edge walking, and St Margaret's Bay Holiday Park sits barely a mile away, making this a natural half-hour detour if you're staying nearby. It's free, accessible, and genuinely unusual - the sort of thing that makes you think about Britain between the wars. History buffs will find it worthwhile; families with restless kids less so. The wind up there is often brutal, and there's not much shelter.

National Trust manages the site, so check their website for exact opening times before you go. Combine it with a walk around St Margaret's Bay itself or push on to the Dover white cliffs if you want a proper day out. It's not going to blow your mind, but it's well worth the short walk from whichever holiday park you're based at - and you won't see anything quite like it elsewhere.