East Dougliehill Reservoir

Water stretches out flat and still under Scottish sky - that's East Dougliehill Reservoir, a working supply lake tucked into West Dunbartonshire between Helensburgh and the broader sweep of Loch Lomond. It's not a tourist spectacle. There's no visitor centre, no café, no marked trails with interpretation boards. What you get instead is peace and decent walking around the perimeter, with views across the water to surrounding hills.

The reservoir draws a quiet crowd - locals with dogs, folk after a straightforward walk, maybe some birdwatchers during migration seasons. The banks are accessible enough, though the paths aren't manicured. Bring proper boots. There's something satisfying about its ordinariness - no crowds, no entry fee drama, just open water and moorland. On a clear day the light catches nicely across the surface. On a dreich one, it's moody as hell.

If you're staying at Stoneymollan over at Loch Lomond (just 6 miles away), this works as a half-day walk alternative to the bigger tourist pulls. Quieter than the loch itself, and you won't be jostling for views with a coachload of visitors. Allow two to three hours for a decent circuit, depending on fitness. It's walker territory really - families with very young kids might find it a bit thin on incident.

Best visited outside school holidays when you might actually hear yourself think. No facilities on site, so bring what you need. Worth the detour if you want breathing room, not if you're after attractions and activities.