Cube circumsbribed by tetrahedron - tetrahedron circumscribed by cube

There's a gallery near Folkestone that's genuinely worth the detour if you've got even a passing interest in geometry or contemporary art. The main draw is an installation exploring the relationship between a cube circumscribed by a tetrahedron and that same tetrahedron circumscribed by a cube - which sounds more baffling than it actually is once you're standing in front of it. It's one of those pieces that makes you slow down and think properly about three-dimensional space, rather than just scrolling past on your phone.

This is absolutely for adults and older teens who appreciate abstract work. Young children will probably lose interest within minutes unless they're the type who stare at shapes and ask endless questions. Art students and maths enthusiasts will get the most from it, though anyone with curiosity will find something to chew on.

If you're staying at Varne Ridge Holiday Park or Greenhill Glamping - both excellent bases just a couple of miles out - this makes for a decent hour-long stop without eating your whole day. It's a proper thinking piece rather than a crowd-pleaser, which is exactly what makes it worth seeking out. No gimmicks, no gift shop nonsense. Just the work itself.

Check ahead for opening hours and admission fees as details are thin on the ground, but it's the kind of spot that rewards a bit of planning rather than assuming you can just roll up.