Longwater

The water at Longwater sits calm most mornings, reflecting the Buckinghamshire sky back at you like a mirror that's just been polished. It's a proper lake - not some ornamental puddle - carved out near Rickmansworth and popular with walkers, fishermen, and anyone after a bit of peace without traveling to the Cotswolds.

The main appeal is straightforward: a decent walk around the perimeter, good for stretching your legs if you've been cooped up in a caravan at Highclere down the road. The towpath is well-maintained, and you'll spot waterfowl if you're quiet. There are a few spots to sit and actually look at something that isn't a motorway.

Families with primary-school kids will find it keeps them occupied for an hour or so. Teenagers might get restless unless they're the brooding type who appreciate stillness. Serious walkers and birdwatchers get more from it - bring binoculars if you're into that. The fishing community clearly knows what they're doing here, so if that's your thing, it's worth investigating the local rules.

It's free to visit, though there's limited information online about specific facilities. Avoid summer bank holidays when it gets busier than necessary. If you're staying at Highclere, Longwater works as a decent morning or late-afternoon stop before heading into Rickmansworth proper for lunch or coffee. Not a must-do, but it does what it says on the tin - offers a lake, some air, and somewhere to walk without paying entrance fees.