Budapest

Budapest was the capital of Hungary. It was the location of the famous Buda Castle where Vlad the Impaler was once imprisoned. The river Danube flowed through Budapest. (AUDIO: The Labyrinth of Buda Castle)

History
According to the Fifth Doctor, there were a spate of unsolved and brutal murders in Budapest in 1898, which he attributed to werewolves. (PROSE: The Juror's Story)

The Fourth Doctor and Romana II encountered the vampire Zoltán Frid in Budapest in 1980. (AUDIO: The Labyrinth of Buda Castle)

The Year That Never Was
During the Year That Never Was, Martha Jones claimed to have gone to Budapest to collect one of the vials of liquid needed to arm the gun she was allegedly preparing to kill with. (TV: Last of the Time Lords)