Barns of Airlie Souterrain

Underground stone passages don't usually get the pulse racing, but the Barns of Airlie Souterrain genuinely does. This Iron Age tunnel system near Blairgowrie runs beneath what would have been a settlement, and walking through it now - ducking under the corbelled stone roof - gives you a proper sense of how ancient folk lived here, packed into these chambers for reasons archaeologists still debate. Storage? Defence? Ritual space? Nobody's entirely sure, which makes it oddly compelling.

The souterrain itself is modest in scale but atmospheric. The main passage is about 25 metres long, with side chambers branching off. It's free to visit and accessible most of the time, though you'll want sturdy boots and a torch - it's damp underfoot and genuinely dark in places. Allow an hour if you're taking photos and reading the interpretation boards; fifteen minutes if you just want a quick look.

History buffs and archaeology enthusiasts will find this worthwhile. Kids might enjoy the adventure of it for a bit, though there's not much interactive stuff, so under-tens could lose interest fast. The real draw is the immediacy of standing in a 2,000-year-old space.

It works well as a half-day add-on if you're staying at Nethercraig Holiday Park or Five Roads Caravan Park - both only a short drive away. Blairgowrie itself has decent facilities and makes a good base. Don't expect a visitor centre or facilities on-site - this is raw archaeology, kept simple and left to speak for itself.