I made the effort and rode out to the pillbox that started it all. This is one of the best preserved we have left on the Island.
As I walked round the outside trying to work out where the door would have been (that I assumed had been blocked up) I spotted the information board
All the years I've been going past it and I never knew they climbed in through the roof. Having visited one I made the effort to ride up to the top of Culver where the bases of two more were allegedly present, but no sign. The remains of the Naval Artillery Battery are still there.
As can be seen it's a bit harder to break up and remove than a pillbox, hence it surviving. I headed down to Sandown Bay, spotting a bonus extra pillbox on the way, its not listed in the history site, I guess it was part of the Yaverland Battery so didn't get a separate listing.
Lastly we have the pillbox at what is now the zoo.
That's all the pillboxes close to home, the rest are out west wight so more effort required to see them.