If you are in the research mood, in Austria there is also the castle Lockenhaus where you can find inspiration about another monster, Die Geheimnisse der Blutgräfin Elisabeth Báthory: https://www.ritterburg.at/burg/geschichte
Es gibt Führungen in der Burg Lockenhaus, über die Blutgräfin ebenso auch über Dracula:
https://www.ritterburg.at/erlebnisse/fuehrungen
The Austro-Hungary history is deeply connected to these, as Dracula's home province (now in Romania) was once called Siebenbürgen and was part of Hungary.
Seems both Vlad the Impaler and Elizabeth of Bathory were inspirations for Dracula.
both the castles Lockenhaus and Forchtenstein have special presentations on that subject. The Austrian province of Burgenland was once part of Hungary, and further back in history, Hungary was part of the Austrian Empire, and Hungary extended over the greatest parts of todays Romania, where Dracula originated. Transilvania was called Siebenbürgen at that time and had a sizable population of German origin (even to this day).
I seem to recall some TV show covering her story. I believe they bricked her up in a cell in the end when they found out what she was doing.