"Give me a minute." Hermione raised her wand and murmured softly to herself. "Germany...North Rhine...Wewelsburg...yes, that's it. It has to be."
The ivy sheathing the house shivered slightly. "Schloss Niederhagen. It's the smallest of Grindelwald's houses, more of a retreat than anything else. Supposedly the place was abandoned after his death, but I wouldn't be surprised if there were still protective spells. Grindelwald was almost as paranoid as Voldemort."