Cliffe Fort

Very sad it's on private land, fenced off and not accessible. So you might be able to break in and trespass after making your way through thorny bushes :(

Once you find the launch ramp for the torpedo, you're right next to a metal fence. Several panels are missing and this gap is how you access the fort. The lowest levels are flooded but the top and second floors can be accessed if you're able to climb a 6ft tree and use stairs without dying. The graffiti here is incredible.

Ot says no trespass but worth to see the place as it is massive and cand be seen British history. Loved it.

You can walk round it but can't go inside

Walked from St. Mary's Church which is a fair distance. It was a lovely day and a very interesting visit. The fort is fenced off now and looking in a sorry state. The nearby Hans Egede shipwreck is worth a view as you walk along the path. The Coalhouse Fort can be seen clearly on the opposite side of the river.

Unfortunately not much to see or say. You only get a view of one facade and that's from over the small organically formed moat. But it's a lovely walk there with some interesting views and the RSPB pools. So, I will be going again...

Got pretty excited to discover a little bit of history in the area - unfortunately it's not the easiest to get to, having to navigate through an active quarry to get to it. Also, more unfortunately, the fort itself once you reach it is almost inaccessable.
I'd already seen reviews that you could only access the outside but I thought it would be worth a walk anyway, but it's mostly flooded (including around the outside) and surrounded by sand mounds and is heavily overgrown with brambles so even trying to have a look around the outside is difficult.
Its quite deteriorated and has quite a lot of graffiti.
If you don't mind dodging big yellow trucks with stones, skipping some barb wire, walking a mile in sand, then this is your place.
Although I didnt actually see any signage at all to say it was closed to the public, and Google says its open... the fort itself has a lot of signage on the windows to say trespassers not allowed - but I assume this is physically inside the fort, due to the dangers.
Id suggest you dont take kids or pets.
Also, wear shoes you don't mind getting dirty.

Slightly disappointed, but enjoyed the walk none the less. Cliffe pools are nice to walk around.

It's a long way to walk from the RSPB car park and it is hard to see much. Remember it's all fenced off . But.. if you get there, do walk round to the south side, and then you get a good view of the older back end of the fort. Clearly the gravel company wishes the place was not there. If properly preserved, it could be interesting. But at this moment - for specialists only.