Woodhead Reservoir

Water stretches between moorland hills, and that's Woodhead Reservoir - a proper industrial-age dam that's somehow become rather peaceful. It's a working water supply for Sheffield, built back in the 1870s, but what matters now is the walk around it and the views across to the Pennines. The dam itself is Victorian engineering that's held up reasonably well, though it won't blow your mind architecturally. What will, though, is the walk. There's a decent circuit around the water - takes a couple of hours depending on your pace - and it's the kind of place where you'll see walkers with proper boots rather than Instagram tourists, which sets the tone. The moorland around it gets wild in bad weather, which means it can feel genuinely atmospheric on a grey afternoon. Families with older kids will get on fine here, though toddlers might find the exposed paths a bit much. Bring waterproofs; the wind funnels down from the moors and the weather changes fast. It's free to wander, no gates or barriers, so you can turn up anytime. Holmfirth's only a few miles south, which is handy for a cafe or pub afterwards. If you're camped at Whitegate or Thurlmoor Farm nearby, this works as a half-day outing. Not a destination on its own, but genuinely worth the detour if you're doing the wider Peak District loop. Water reflections are decent for photography if the light cooperates.