You could almost miss it driving through Medway, an old wall with a gun turret overgrown. It’s hard to tell if the plan is to preserve it or let it go to ruin.

The entrance isn’t the big gates flanked by the National lottery sign but the cafe. And when you park there (much better than the riverside carpark, though slightly more) it’s unclear what to do next.

The cafe is where you book tunnel tours (but they are booked out a couple weeks) and can find a leaflet on the shelf with a map. Though it is about the worst map possible without a legend, nothing to scale but it does clarify that you need to leave the carpark by the entrance, turn right and walk up. And keep walking up, past the bit that looks like private residences / shacks and you’ll find just how big this fort is.

The place has so many cannons, though most of the views of where they would shoot is obscured by plants. The views at the top are good though and worth the trek.

Kids are sort of accommodated with an owl, mouse and fox having a story that doesn’t quite make sense but looks cute. They’re hidden behind gates.

Our kids loved it and it feels like there is more to discover - just make your own plan about how to approach it!