Drachensberg

Drachensberg was a castle in Germany, located hundreds of miles from Berlin, owned by Heinrich Himmler and used by the Black Coven as their base. Doctor Felix Kriegslieter abducted Ace and took her to Drachensberg via transmat to lure the Doctor there. After Hermann Goering and his men attacked the castle and wiped out the Coven, the Doctor set the nuclear reactor located in the basement to overload, destroying the castle and the advanced technology contained in it. (NA: Timewyrm: Exodus)