Milford Haven Waterway

The waterway itself is the thing here - a proper working estuary that cuts deep into Pembrokeshire, lined with industrial heritage and natural beauty in equal measure. Milford Haven town sits right at the mouth, and from the waterfront you get views across to the refineries and docks that still give this place its character. It's not chocolate-box Wales, but it's honest, and that's worth something.

Walking the shoreline or taking a boat trip lets you see how the landscape changes as you move inland - from the industrial basin to quieter stretches where birds gather. The whole thing is free to explore on foot, which is the best way to do it. Give yourself a couple of hours minimum if you're serious about it, though you can grab a quick impression in half an hour from the town centre.

Families and walkers will get the most from this. It's not a theme park - there's no admission fee, no gift shop, no queue. Historians and industrial enthusiasts should absolutely make the effort; seeing how Victorian and modern infrastructure sits alongside coastal ecology tells you something real about Wales. The waterway sits perfectly for a park-based holiday - Eco Escape Campsite and Grass Roots Caravan Glamping are both within walking distance of town, so you can pitch up and spend a morning exploring without getting in the car again. Best visited when the tide's high and the light's decent, which in Pembrokeshire means pretty much any clear day.