Mill Dam

Mill Dam is a proper little freshwater lake just outside Helensburgh, the sort of place locals know about but tourists often miss entirely. It's genuinely peaceful - water reflecting sky, trees all round, the kind of spot where you can actually hear yourself think. You can walk the perimeter, which takes a good hour if you're taking it slow, and there are benches scattered about if you just want to sit and watch for a bit.

Families with younger kids will get a solid hour or two here, particularly if there's any chance of spotting waterfowl. Older walkers tend to appreciate it more; it's unpretentious and requires zero effort to enjoy, though it's hardly dramatic scenery. The water's decent for a dook if you're keen, though I'd check locally first what the water quality's like.

There's no charge as far as I can tell, and no fixed hours either - it's just there. Worth combining with one of the nearby caravan parks like Rosneath Castle or Hunters Quay if you're staying in the area for a few days. It's not going to blow your mind, but it's the sort of place that reminds you why you bothered leaving the motorway in the first place. Best in decent weather when you can actually see across it.