Fourteen Swallets #5

The limestone isn't the only thing that'll take your breath away around Ruthin - these fourteen natural sinkholes carved through the bedrock are the real draw for anyone keen on proper geology. Each swallet is essentially a vertical drop where surface water has dissolved the rock below, creating these dramatic funnels that vanish straight down into darkness. You won't be descending into them yourself unless you're a caver with equipment, but walking the area and peering into the various openings gives you a genuine sense of how the landscape has been sculpted over millennia.

This is firmly walker territory. The swallets aren't a single visitor attraction with facilities - they're scattered across the Denbighshire countryside, best explored on foot from nearby Ruthin. You're looking at a few hours wandering around to see several of them properly, though one good afternoon walk will hit the most accessible ones. It's free, obviously, and the drama is real: standing above a 40-foot drop that leads to underground rivers and caverns focuses the mind quickly.

Families with confident walkers aged ten and up will find it fascinating; younger kids might struggle with the unforgiving terrain. The real magic is for anyone who likes understanding how landscapes actually work rather than just looking at pretty views. Stay at Clwydian Glamping Pods and Campsite, just a few miles away, and you've got a proper base for exploring this corner of North Wales. February to October is best - winter makes the paths treacherous.