Reservoir No 1

The water here is surprisingly clear for an industrial reservoir, which is what Reservoir No 1 essentially is - a Victorian-era holding lake that actually works rather nicely as a walking destination. You'll find it just outside Helensburgh, surrounded by proper Argyll countryside that doesn't scream "infrastructure project" the moment you arrive.

It's a solid choice for a quiet circular walk rather than a destination in itself. The path around the perimeter gives you good views across the water, and on a calm day the reflections are genuinely pleasant. Walkers will appreciate the gentle terrain, though don't expect dramatic Highland scenery - this is more gentle rolling country with the occasional copse of trees. Families with young kids will manage it fine, though they might get bored if you're planning to spend hours here.

The real appeal is how it slots into a broader exploration of the area. If you're based at Loch Lomond Retreat or one of the parks nearby - Stoneymollan or Lomond Woods are both within five miles - this works as a morning stroll before heading to bigger attractions. It's the sort of walk you do because you're in the region, not because you've driven there specifically.

Go early in the day when it's quietest. There's something about having a reservoir mostly to yourself that makes it feel more like a proper lake. Allow an hour for the circuit depending on your pace. Free access, no fees or faffing about - just turn up and walk.