Or maybe a very rough interior sketch where only major rooms are really listed.
I'm thinking about maybe giving them the three images of the 'external' parts of the castle.
I don't really just want to give them a full blown map of the castle, but I also want it to be something of a reward. My question is what should I do for the players if they find it? So my players are about to explore the Amber Temple and could find the model of Castle Ravenloft, especially since they think maps could be here.