All the geography quotes from the books, another collection of the same and the map I built from them. There are some non-canon places on that map because its one I used for an RPG, and even more non-canon in the rest of the geography I did for the game.
Another map I did that is probably more accurate to the text but unrealistic (rivers dont flow parallel to the sea like that).
This Book has some castle maps.
Roger Zelazny's Visual Guide to the Castle Amber perhaps?
https://www.amazon.com/Roger-Zelaznys-Visual-Guide-Castle/dp/0380755661