Fort Rowner

A sprawling Victorian fort sits on the coast near Lee-on-the-Solent, its massive earthworks and brick structures a proper reminder of 19th-century military anxiety. Fort Rowner was built in the 1860s as part of a chain of defences protecting Portsmouth Harbour from French invasion - a threat that never quite materialised. What you get is a substantial ruin: grassed-over ramparts, crumbling gun emplacements, and enough open space to wander about without feeling hemmed in.

It's the sort of place history buffs will spend a good hour or two exploring, photographing the architectural details, trying to visualise how the cannons would have commanded the water. Kids can run around the embankments without much risk, though there's not a lot of interpretation or fancy visitor facilities - you're essentially free to poke about on your own. The views across the Solent aren't remarkable, but they're pleasant enough if the weather holds.

Local walkers clearly use it regularly. The paths are well-trodden and the ramparts offer a decent circuit walk if you're based nearby. If you're staying at Woodside Bay Lodge Retreat or Solent Breezes Holiday Park, it's close enough for a morning visit without the rigmarole of proper planning. Don't expect a grand day out - think of it more as a worthwhile detour on a coastal walk round Lee-on-the-Solent, especially if you've got an interest in Victorian military engineering. Bit of a windswept spot come winter.