Hehehe... give people a stone and they will build castles in eternity!
All in all I think there are a lot of great descriptions of the castle, as well as explanations for WHY everything is it looks like it does... and things works the way they do.
Let's hear all of them! Let all the characters present their theories giving a total chaotic image of the place, heightening the atmosphere
... and not one of them will probably be right
To make it easiest for everyone, you could say that the castle and valley exists on the brink of civilization
in every world ! (with the area having a general Transylvanien outlook in all of them).
Somehow, something in the castle, its history, or perhaps the site itself causes it to exists in a multitude of places at the same time, perhaps adding to an explanation on why the castle is a hoxpox of building styles, not only through time, but through different worlds!
The castle may on the outside look like a huge complex, but the inside may be even larger, with even more strange buildings and rooms, not all of them of what we would call standard "castle-stock", and still the castle exists several places at the same time.
.... which may be why different characters can be in the same general area, but the surroundings may look a tad bit different
Why are people drawn to this place? The return of the castles original family owners has caused it to appear more solid in the different worlds, and perhaps somebody comes to investigate or has gotten news of the invitation?
To give Ron (he should make the initial 2D model, right?) something to work with, what about saying that the castle lies along and on a minor low ridge, stretching for mayeb two hundreds of yards, an outer wall preventing sheer drop to the valleyfloor and shielding building after building behind in layers up to those at the top, a kind of Minas Tirith effect?
My 15 cents
