Inigo Jones Slate Works

The slate industry built North Wales, and this is where you see the evidence - the Inigo Jones Slate Works near Caernarfon is a proper window into what that labour looked like. You're walking through the remains of quarry operations that once fed the Victorian building boom, with the working faces of the slate still visible in the rock and the old processing areas telling their own story without needing much interpretation.

It's not a visitor centre with tea and souvenirs. This is industrial archaeology in the raw - think atmospheric rather than polished. History enthusiasts and anyone curious about how Wales earned its wealth will find it genuinely absorbing. You can see where the men worked, how the stone was extracted and split, the remnants of the infrastructure that kept it all moving. Allow a good hour if you're properly poking about, though you can cover the main bits in half that.

The location works well if you're based at one of the caravan parks dotted within a few miles - Dinlle or Morfa Lodge are closest. It's the sort of detour that makes sense when you're already in Caernarfon exploring the castle and the town itself. Combine it with a walk along the nearby coast and you've got a solid afternoon. Fair warning though: it can get muddy and the paths aren't always obvious. Wear proper shoes and check ahead on access - these sites can be temperamental about opening times.