The non-annotated version is here. EDIT: Bonus alternate annotated version.
EDIT: Apologies, I was recently made aware that Slovenians do not like being referred to as Eastern European. Sorry about that.
This is Predjama Castle, a real place in the Eastern CENTRAL European nation of Slovenia. That’s right: Eastern Europe– the most brutal and merciless of all the Europes. Leading cause of death in the middle ages? Dracula. Number two? Gypsy curses. Number three? The church.
How do you survive all that? You build this place. Predjama is the castle a paranoid person builds. Start by constructing it in the mouth of a cave. Put a drawbridge on the front door. Then, put another drawbridge on the top level, leading to an inner citadel in the caves behind the castle. Then, dig an escape tunnel leading through those caves to a hidden exit in a nearby well. That just might do it.
This place is one of the most Ravenloft things that has ever happened. Like a vampire reading Edgar Allan Poe on a chair made of lost hope. I love it.
One last thing: this map was proposed to the Cartographic Congress by someone who has since had to delete their patreon account, but I’d still like to give them the patron content for this map if I can. If you are that person, please email me and I’ll send it your way. Also, thank you for suggesting this map.
DM notes and VTT versions of this map are available to patrons.