Yet another example of interiors not matching exteriors is Number six's residence in the Billage
A long time ago, I joined a "Prisoner" fan club which simply meant I got a newsletter or magazine quarterly and could by merchandise by mail. One thing I got was a number six badge. There was a certain validity to this because in a family of eight kids, I'm number sixc.
Anyway One thing I certainly bought was a map of the Village, that is, the Portmerion complex, it was supposed to match the larger, colored map the storekeeper handed six in the first episode. It was fun to see where all the places were relative to one another, like number six's place and the green dome, number two's place. I know I checked but I can't remember if the window six looked out in the opening sequence really looked out to the view he had but I imagine maps of the place are online now.
Regarding "Voyage to the Bottom of the Sea", the interior of the flying sub did seem to fit in the exterior with one problem, the hatch at the back of the flight deck opened directly outside which begged the question of where are the frickin' engines associated with the exhaust thingies on the back of the exterior?
back in the late '80s, I got a scale model kit of the Flying Sub which had detailed interiors, you could lift the top off to see the inside. Well, on this model, the hatch at the back of the flight deck opened into another compartment at the back end of the sub containing the two engines and another hastch between them to the outside.
I don't know if the proportions were correct but on this model the interior and exterior did seem to roughly match the show aside from the problem I mentioned above.
Robert