Melksham Blue Pool

The water here is an extraordinary turquoise - so vivid it feels almost artificial, though it's entirely natural. Melksham Blue Pool sits in Wiltshire just outside Trowbridge and is essentially a flooded chalk quarry that's been left to fill with groundwater rich in minerals that give it that stunning colour. It's become a proper local swimming spot, drawing everyone from serious lap swimmers to families wanting a dip on warm days.

What strikes you immediately is how clear the water is, particularly on sunny mornings when the light hits it just right. The pool isn't massive, but it's deep enough for proper swimming rather than paddling about. You'll find the setting fairly low-key - no frills, no changing facilities to speak of, just a natural swimming hole that feels wonderfully uncomplicated.

It works brilliantly if you're staying at Mill Farm Glamping nearby and want to break up a relaxing park holiday with something more active. The drive from there is only about five miles. Swimmers and outdoor enthusiasts will get the most from it; young children might find it a bit basic unless they're confident in the water already. Go on a weekday morning if you want it relatively quiet, and avoid winter when the water temperature drops significantly.

Free to access, and you can spend as little as thirty minutes or a full morning here depending on how you fancy using it. It's the sort of place that rewards a visit if you're already in the area, though not worth a special trip on its own.